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/editor/inspector/objectSection.ts

@@ -287,10 +287,9 @@ function componentRow<V extends object>(
  * or, inside a container, to the template) and ↑ (apply upwards).
  *
  * Inside a container a value has two bases – the template it was instantiated from and, one
- * step further up, the asset – so ↺/↑ can become a menu. Only bases the value really differs
- * from are listed, so a menu never contains an entry that would change nothing. Dropping the
- * override is what makes the object follow the asset again: the template is only read when
- * the container is placed, never at draw time.
+ * step further up, the asset – so ↺/↑ can become a menu. Dropping the override is what makes
+ * the object follow the asset again: the template is only read when the container is placed,
+ * never at draw time.
  */
 function propertyRow(
   host: InspectorHost,