Fix incorrect category size in EditorInspector on style switch

[YeldhamDev]

Fixes #112244.

[KoBeWi]

This should already happen automatically:

godot/scene/gui/control.cpp

Lines 3940 to 3947 in 0870525

	case NOTIFICATION_THEME_CHANGED: {
	emit_signal(SceneStringName(theme_changed));
	_invalidate_theme_cache();
	_update_theme_item_cache();
	queue_redraw();
	update_minimum_size();

Why is it needed here?

[YeldhamDev]

The Control.NOTIFICATION_THEME_CHANGED happens first, then the class one. And is there where the theme is initialized, so the minimum size is out of date.

[akien-mga]

Thanks!

[KoBeWi]

Now the size is updated multiple times.
The update in Control should be deferred or something.

[YeldhamDev]

Couldn't that potentially create problems elsewhere?

[KoBeWi]

Yeah, it needs some deeper investigation.

[YeldhamDev]

Alright, I found a better solution: make the theme code be ran by the theme_changed signal instead, as that fires before the minimum size update. Will open a PR.