Files list: Add "New Folder.." popup when nothing under mouse cursor
Created by: Krakean
Small issue: currently, if there is nothing under mouse cursor in project's file list panel, when you try to right mouse button click - nothing happens.
After this patch, when you RMB on empty space in files list panel, you will see a popup with "New Folder.." item. Screenshot: https://i.imgur.com/xvvNpbh.png