Thanks for that great new feature! These should be pretty easy to implement but SUPER helpful:
Hightlight or have a column with a checkmark to show which of the plugins on the left have been dragged into the right panel (so we don’t miss or forget a plugin). You’d know at glance if their rows were shaded if they’re currently loaded into the custom menu already.
When dragging them into a folder they go on the top level, which means your folder is backwards (Z is at the top, A is at the bottom), of course we can work with this by working backwards on the left, but this suggested solution is probably the right way to go about it.