* fix: reduce React Doctor diagnostics in ModelControls (69/88)
* Move EditModeIcon and IconBadge to module scope to prevent remount on every render
EditModeIcon and IconBadge were defined as React.FC inside ModelControls
function body, producing a new component type reference on every render
and forcing React to unmount/remount subtrees. Moves both to module
scope; EditModeIcon no longer closes over editToggleIconClass since all
callers already pass an explicit className prop.
Bohdan Triapitsyn
8056fae275