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/nodeSection.ts

@@ -88,9 +88,8 @@ export function refreshNodeSection(host: InspectorHost, assetId: string, nodeId:
 }
 
 /**
- * Variable params are the one kind of setting the node cannot declare on its own: their
- * options are the variables of the behavior the node sits in. Everything else, asset
- * references included, is used exactly as declared.
+ * Variable params are the one setting a node cannot declare on its own: their options are the
+ * variables of the behavior it sits in. Everything else is used exactly as declared.
  */
 function resolveParamDef(param: PropertyDef, asset: Asset): PropertyDef {
   if (param.kind !== 'enum' || param.key !== 'variable' || asset.type !== 'behavior') return param;