A common feature i got used to in many editors is that when asset or file browsing i can click on the triangle that expands/contracts a folder. If i do that with alt.+click it also either contracts or expands all the subfolders of the triangle I pressed. At least for me this convenience feature significantly speeds up asset/item browsing.
I agee with this request. It was implemented in Editor 1 but not 2 and is regularly missed!
I want this too! Here are the feature request for it (I want it so much I apparently reported it twice)