Trim needless comments and fix the picker width

Remove comments that only restate the code, keeping the section banners
and the notes that carry a reason, a measured fact or an external
contract.

ButtonOptions.width claimed to be a fixed width but only set minWidth,
so the Graph and Texture pickers grew with the name they showed. It is
now what it promises, with a separate minWidth for the buttons that have
two forms. Narrow buttons shrink their padding, otherwise a 24px icon
button had 8px left for its glyph and truncate dropped it entirely.

__gm.labelsDropped() guards that class: the overflow guard only saw text
that was too wide, never a label truncated to nothing.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

src/ui/widgets/Menu.ts

@@ -15,20 +15,13 @@ export interface MenuItem {
 }
 
 export interface MenuOptions {
-  /**
-   * Adds a search box above the entries that filters them as you type; Enter picks the first
-   * match. For menus that can grow with the project (the parent picker lists every object).
-   */
+  /** Adds a search box above the entries that filters as you type; Enter picks the first match. */
   searchable?: boolean;
 }
 
-/** How tall the entry list gets before it starts scrolling. */
 const MAX_LIST_HEIGHT = 320;
 
-/**
- * A vertical list of clickable actions. Picking one closes the menu before it runs.
- * Entries read as a list: left-aligned, scrolled once they no longer fit on screen.
- */
+/** A vertical list of clickable actions. Picking one closes the menu before it runs. */
 export class Menu extends Popup {
   private readonly entries: { button: Button; haystack: string }[] = [];
   private readonly list = new VStack({ gap: 2 });
@@ -72,7 +65,6 @@ export class Menu extends Popup {
     if (this.search) ui().focus.focus(this.search);
   }
 
-  /** Shows the entries matching the search box and resizes the menu around them. */
   private filter(): void {
     const query = this.search?.value.trim().toLowerCase() ?? '';
     let matches = 0;
@@ -88,9 +80,8 @@ export class Menu extends Popup {
     this.scroll.minHeight = Math.min(size.h, MAX_LIST_HEIGHT);
     this.scroll.scrollTo(0);
     this.refreshLayout();
-    // Both calls are needed: a resize alone re-lays out only when the size actually changed,
-    // and two different filters can leave the list exactly as tall as before while showing
-    // an entirely different set of entries.
+    // Both are needed: a resize re-lays out only on an actual size change, and two filters can
+    // leave the list exactly as tall while showing different entries.
     this.scroll.relayoutContent();
     this.list.relayout();
   }