gridmenu_category can not be used with modifier keys

[Azzurite]

Description

Holding a modifier breaks out of the gridmenu_category code, making this function impossible to use with modifiers held:

Beyond-All-Reason/luaui/Widgets/gui_gridmenu.lua

Lines 1030 to 1031 in 83d62f8

	if alt or ctrl or meta then
	return

Expected Behaviour

Allow gridmenu_category to be bound to key combinations which include modifiers

Actual Behaviour

gridmenu_category is unusable when bound to for example Ctrl+Z/X/C/V instead of the same without the Ctrl key

Other

@badosu on Discord said that the removal of this if...return should probably be done in conjunction with un-hardcoding the "factory ones" as well