It bugged me that when you favourite an item, a big oversized star appears that is misplaced - like so[i.imgur.com].

If you want to get rid of it, modify the file C:\Program Files (x86)\Steam\steamapps\workshop\content\108600\3623352001\mods\CleanUI_PatchB42.13\42.13\media\lua\client\ISInventoryPane_PatchB42_13.lua

Replace the code with this one: https://pastebin.com/BjBPcXG5