Function that enables to Expand or Collapse All folders/subsets in Navigator.
This function can be enabled when selecting certain folder/subset and pressing right mouse button and also with shortcuts like "CTRL + Left Arrow" - Collapse All, "CTRL + Right Arrow" - Expand All.
These function should work only on folders/subset you are selected, not the whole project tree.
This works on a Mac. You can select the arrow of whichever folder you want to expand whilst holding option and all folder within either open or close depending on their existing state.