Ray Kholodovsky - small reqs regarding UI "file...

small reqs regarding UI "file browser" 1. add a back/ "up tree" button to go back a directory level. this has been an "I want this" annoyance many times already. 2. allow defining which files are "pinned" in that top section of the explorer. I realize that right now it's showing the proj dir root. I almost think of it as a "Favorites" section. Perhaps a higher up separate "Favorites" section? defined by some config somewhere?