Port field moves from the menu, SEL with Select, and moving Pokémon in Bill's PC

Field moves chosen in the party menu run their original checks and the
ROM's from-menu scripts (Cut, Surf, Strength, Flash, Whirlpool, Waterfall,
Sweet Scent), and Softboiled and Milk Drink share HP. SEL registers a key
item that Select then uses, replacing the Key Items shortcut, and Bill's
PC moves Pokémon between the party and every box.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

src/ui/styles.css

@@ -1117,30 +1117,6 @@ dialog dd {
   }
 }
 
-.field-menu {
-  position: absolute;
-  inset: 1rem 1rem auto auto;
-  z-index: 6;
-  max-height: calc(100% - 2rem);
-  overflow: auto;
-  min-width: 10rem;
-  padding: 1rem;
-  border: 2px solid #27332a;
-  border-radius: 0.4rem;
-  background: #f8f4df;
-  color: #27332a;
-}
-.field-menu[hidden] {
-  display: none;
-}
-.field-menu p {
-  margin: 0 0 0.5rem;
-}
-#field-items {
-  display: grid;
-  gap: 0.3rem;
-}
-
 .town-map-view {
   position: absolute;
   inset: 0;