[Xrystal]

Folder: \Interface\AddOns\nUI\Plugins\
File: nUI_ButtonBag.lua


There is this block of code near the top of the file:

	-- buttons we want to force ignore of
	
	Excludes = 
	{		
		["MiniMapMailFrame"] = true,
		["MiniMapBattlefieldFrame"] = true,
		["MinimapBackdrop"] = true,
		["MiniMapPing"] = true,
		["MiniMapCompassRing"] = true,
		["MinimapZoomIn"] = true,
		["MinimapZoomOut"] = true,
		["MiniMapTracking"] = true,
		["MiniMapWorldMapButton"] = true,
		["GatherMiniNoteUpdateFrame"] = true,
		["TimeManagerClockButton"] = true,
		["FishingBuddyMinimapMenuButton"] = true,
		["PoisonerMinimapButton"] = true,
		["MiniMapLFGFrame"] = true,
		["GameTimeFrame"] = false,
	},	
	
	-- buttons we want to force inclusion of
	
	Includes = 
	{		
		["WIM_IconFrame"] = true,
		["CTMod2_MinimapButton"] = true,
		["PoisonerMinimapButton"] = true,
		["GameTimeFrame"] = true,
		["MobMapMinimapButtonFrame"] = true,
		["BaudGearMinimapButton"] = true,
	},

The exculdes are ones that appear on the map the Includes are ones that get thrown in the bag. Apart from Calendar which gets toggled with /nui calendar if I remember rightly.

If you can locate the name of the button try adding it to the respective block and do a reload of the UI and see if it resolves your problem.