Now stores the sites list so you can quickly modify your choices without reloading the whole list

Sharepoint_ToolBox.ps1

@@ -212,7 +212,9 @@ function Show-SitePicker {
     param(
         [string]$TenantUrl,
         [string]$ClientId,
-        [System.Windows.Forms.Form]$Owner = $null
+        [System.Windows.Forms.Form]$Owner   = $null,
+        [object[]]$InitialSites             = @(),
+        [string[]]$PreSelected              = @()
     )
 
     $dlg                 = New-Object System.Windows.Forms.Form
@@ -333,6 +335,16 @@ function Show-SitePicker {
         ClientId      = $ClientId
     }
 
+    # Pre-populate from cache + restore previous selection
+    if ($InitialSites -and $InitialSites.Count -gt 0) {
+        $script:_pkl.AllSites = @($InitialSites)
+        foreach ($url in $PreSelected) { [void]$script:_pkl.CheckedUrls.Add($url) }
+        $btnLoad.Text = "Recharger"
+        _Pkl-Sort
+        _Pkl-Repopulate
+        $script:_pkl.BtnOK.Enabled = $true
+    }
+
     # ItemChecked fires AFTER the checked state changes (unlike ItemCheck)
     $lv.Add_ItemChecked({
         param($s, $e)
@@ -437,8 +449,10 @@ function Show-SitePicker {
                     $script:_pkl.LblStatus.ForeColor = [System.Drawing.Color]::Red
                 } else {
                     $script:_pkl.AllSites = @($script:_pkl.Sync.Sites)
+                    $script:_SiteCache    = @($script:_pkl.Sync.Sites)
                     _Pkl-Sort
                     _Pkl-Repopulate
+                    $script:_pkl.BtnLoad.Text  = "Recharger"
                     $script:_pkl.BtnOK.Enabled = ($script:_pkl.Lv.Items.Count -gt 0)
                 }
             } else {
@@ -451,8 +465,8 @@ function Show-SitePicker {
 
     $result = if ($Owner) { $dlg.ShowDialog($Owner) } else { $dlg.ShowDialog() }
 
-    if ($result -eq "OK") { return @($script:_pkl.CheckedUrls) }
+    if ($result -eq "OK") { return ,@($script:_pkl.CheckedUrls) }
-    return @()
+    return $null
 }
 
 #endregion
@@ -1819,8 +1833,10 @@ Function Generate-PnPSitePermissionRpt {
     )
     Try {
         Write-Log "Connecting to SharePoint... (browser window will open)" "Yellow"
+        [System.Windows.Forms.Application]::DoEvents()
         Connect-PnPOnline -Url $SiteURL -Interactive -ClientId $script:pnpCiD
         $Web = Get-PnPWeb
+        [System.Windows.Forms.Application]::DoEvents()
 
         Write-Log "Getting Site Collection Administrators..." "Yellow"
         $SiteAdmins = Get-PnPSiteCollectionAdmin
@@ -1862,9 +1878,7 @@ Function Generate-PnPSitePermissionRpt {
                     }
                 }
                 $i++
-                Write-Progress -PercentComplete ($i / [Math]::Max($Folders.Count,1) * 100) `
+                [System.Windows.Forms.Application]::DoEvents()
-                    -Activity "Folders in '$($List.Title)'" `
-                    -Status "'$($Folder.FieldValues.FileLeafRef)' ($i of $($Folders.Count))" -Id 2 -ParentId 1
             }
         }
 
@@ -1888,9 +1902,7 @@ Function Generate-PnPSitePermissionRpt {
                 If ($List.Hidden -eq $false -and $ExcludedLists -notcontains $List.Title) {
                     $c++
                     Write-Log "`tList ($c/$($Lists.Count)): $($List.Title)" "Cyan"
-                    Write-Progress -PercentComplete ($c / [Math]::Max($Lists.Count,1) * 100) `
+                    [System.Windows.Forms.Application]::DoEvents()
-                        -Activity "Scanning lists in $($Web.URL)" `
-                        -Status "'$($List.Title)' ($c of $($Lists.Count))" -Id 1
                     If ($ScanFolders) { Get-PnPFolderPermission -List $List }
                     If ($IncludeInheritedPermissions) { Get-PnPPermissions -Object $List }
                     Else {
@@ -1904,6 +1916,7 @@ Function Generate-PnPSitePermissionRpt {
 
         Function Get-PnPWebPermission([Microsoft.SharePoint.Client.Web]$Web) {
             Write-Log "Processing web: $($Web.URL)" "Yellow"
+            [System.Windows.Forms.Application]::DoEvents()
             Get-PnPPermissions -Object $Web
             Write-Log "`tScanning lists and libraries..." "Yellow"
             Get-PnPListPermission($Web)
@@ -3060,8 +3073,31 @@ $tabs.TabPages.AddRange(@($tabPerms, $tabStorage, $tabTemplates, $tabSearch, $ta
 $progressBar           = New-Object System.Windows.Forms.ProgressBar
 $progressBar.Location  = New-Object System.Drawing.Point(20, 540)
 $progressBar.Size      = New-Object System.Drawing.Size(642, 16)
-$progressBar.Style     = "Marquee"
+$progressBar.Style     = "Continuous"
-$progressBar.MarqueeAnimationSpeed = 0
+$progressBar.Minimum   = 0
+$progressBar.Maximum   = 100
+$progressBar.Value     = 0
+$progressBar.Visible   = $false
+
+# Animation timer: sweeps 0→100 then resets, driven by UI-thread timer
+$script:_AnimTimer          = New-Object System.Windows.Forms.Timer
+$script:_AnimTimer.Interval = 30   # ~33 fps
+$script:_AnimTimer.Add_Tick({
+    $v = $progressBar.Value + 2
+    if ($v -gt 100) { $v = 0 }
+    $progressBar.Value = $v
+})
+
+function Start-ProgressAnim {
+    $progressBar.Value   = 0
+    $progressBar.Visible = $true
+    $script:_AnimTimer.Start()
+}
+function Stop-ProgressAnim {
+    $script:_AnimTimer.Stop()
+    $progressBar.Value   = 0
+    $progressBar.Visible = $false
+}
 
 # ── Log ────────────────────────────────────────────────────────────────────────
 $lblLog                = New-Object System.Windows.Forms.Label
@@ -3086,6 +3122,15 @@ $script:cboProfile     = $cboProfile
 $script:btnBrowseSites = $btnBrowseSites
 $script:Profiles       = @()
 $script:SelectedSites  = @()
+$script:_SiteCache     = @()
+
+# Si l'utilisateur re-saisit manuellement, effacer la multi-sélection du picker
+$txtSiteURL.Add_TextChanged({
+    if ($txtSiteURL.Enabled -and $script:SelectedSites.Count -gt 0) {
+        $script:SelectedSites = @()
+        $btnBrowseSites.Text  = T "btn.view.sites"
+    }
+})
 
 $form.Controls.AddRange(@(
     $menuStrip,
@@ -3341,13 +3386,31 @@ $btnBrowseSites.Add_Click({
             "Veuillez renseigner le Client ID.", "Client ID manquant", "OK", "Warning")
         return
     }
-    $selected = Show-SitePicker -TenantUrl $tenantUrl -ClientId $clientId -Owner $form
+    $selected = Show-SitePicker -TenantUrl $tenantUrl -ClientId $clientId -Owner $form `
-    if ($selected -and $selected.Count -gt 0) {
+                                -InitialSites $script:_SiteCache `
+                                -PreSelected  $script:SelectedSites
+    if ($null -eq $selected) { return }   # Cancel — ne rien changer
+
     $script:SelectedSites = @($selected)
-        # Populate Site URL with first selection for compatibility
-        $txtSiteURL.Text = $selected[0]
     $n = $selected.Count
-        $btnBrowseSites.Text = if ($n -eq 1) { "Voir les sites" } else { "Sites ($n)" }
+
+    if ($n -gt 1) {
+        # Plusieurs sites : griser le champ
+        $txtSiteURL.Text      = ""
+        $txtSiteURL.Enabled   = $false
+        $txtSiteURL.BackColor = [System.Drawing.Color]::FromArgb(224, 224, 224)
+        $btnBrowseSites.Text  = "Sites ($n)"
+    } elseif ($n -eq 1) {
+        $txtSiteURL.Text      = $selected[0]
+        $txtSiteURL.Enabled   = $true
+        $txtSiteURL.BackColor = [System.Drawing.Color]::White
+        $btnBrowseSites.Text  = T "btn.view.sites"
+    } else {
+        # 0 sélectionnés (OK avec rien) — réinitialiser
+        $txtSiteURL.Text      = ""
+        $txtSiteURL.Enabled   = $true
+        $txtSiteURL.BackColor = [System.Drawing.Color]::White
+        $btnBrowseSites.Text  = T "btn.view.sites"
     }
 })
 
@@ -3373,7 +3436,7 @@ $btnGenPerms.Add_Click({
     $btnGenPerms.Enabled   = $false
     $btnOpenPerms.Enabled  = $false
     $txtLog.Clear()
-    $progressBar.MarqueeAnimationSpeed = 30
+    Start-ProgressAnim
 
     $depthLabel = if ($script:PermFolderDepth -ge 999) { "Maximum" } elseif ($script:PermFolderDepth -eq 0) { "N/A (folder scan off)" } else { $script:PermFolderDepth }
     Write-Log "=== PERMISSIONS REPORT ===" "White"
@@ -3409,7 +3472,7 @@ $btnGenPerms.Add_Click({
 
     $script:PermOutputFile = $lastFile
     $btnGenPerms.Enabled = $true
-    $progressBar.MarqueeAnimationSpeed = 0
+    Stop-ProgressAnim
 })
 
 $btnOpenPerms.Add_Click({
@@ -3544,7 +3607,7 @@ function Start-NextStorageScan {
     if ($script:_StorSiteQueue.Count -eq 0) {
         Write-Log "=== All sites processed ===" "Cyan"
         $btnGenStorage.Enabled         = $true
-        $progressBar.MarqueeAnimationSpeed = 0
+        Stop-ProgressAnim
         return
     }
 
@@ -3652,7 +3715,7 @@ $btnGenStorage.Add_Click({
     $btnGenStorage.Enabled  = $false
     $btnOpenStorage.Enabled = $false
     $txtLog.Clear()
-    $progressBar.MarqueeAnimationSpeed = 30
+    Start-ProgressAnim
 
     $depthLabel = if ($script:_StorDepth -ge 999) { "Maximum" } elseif ($script:_StorDepth -eq 0) { "N/A" } else { $script:_StorDepth }
     Write-Log "=== STORAGE METRICS ===" "White"
@@ -3726,7 +3789,7 @@ $btnSearch.Add_Click({
     $btnSearch.Enabled     = $false
     $btnOpenSearch.Enabled = $false
     $txtLog.Clear()
-    $progressBar.MarqueeAnimationSpeed = 30
+    Start-ProgressAnim
     Write-Log "=== RECHERCHE DE FICHIERS ===" "White"
     Write-Log "Site         : $siteUrl" "Gray"
     if ($filters.Extensions.Count -gt 0) { Write-Log "Extensions   : $($filters.Extensions -join ', ')" "Gray" }
@@ -3851,7 +3914,7 @@ $btnSearch.Add_Click({
             try { [void]$script:_SrchPS.EndInvoke($script:_SrchHnd) } catch {}
             try { $script:_SrchRS.Close(); $script:_SrchRS.Dispose() } catch {}
             $btnSearch.Enabled = $true
-            $progressBar.MarqueeAnimationSpeed = 0
+            Stop-ProgressAnim
 
             if ($script:_SrchSync.Error) {
                 Write-Log "Echec : $($script:_SrchSync.Error)" "Red"
@@ -3934,7 +3997,7 @@ $btnScanDupes.Add_Click({
     $btnScanDupes.Enabled  = $false
     $btnOpenDupes.Enabled  = $false
     $txtLog.Clear()
-    $progressBar.MarqueeAnimationSpeed = 30
+    Start-ProgressAnim
     Write-Log "=== SCAN DE DOUBLONS ===" "White"
     Write-Log "Mode         : $($dupFilters.Mode)" "Gray"
     Write-Log "Site         : $siteUrl" "Gray"
@@ -4099,7 +4162,7 @@ $btnScanDupes.Add_Click({
             try { [void]$script:_DupPS.EndInvoke($script:_DupHnd) } catch {}
             try { $script:_DupRS.Close(); $script:_DupRS.Dispose() } catch {}
             $btnScanDupes.Enabled = $true
-            $progressBar.MarqueeAnimationSpeed = 0
+            Stop-ProgressAnim
 
             if ($script:_DupSync.Error) {
                 Write-Log "Echec : $($script:_DupSync.Error)" "Red"