Just a couple of minor suggestions of mine:
1. A "Close file" option on the right-click pop-up menu. Would suggest it go at the bottom of the list.
2. When there are multiple files open, left and right arrows are shown top-right to allow navigation through the tabs. When clicking these, would it be possible to scroll one tab at a time, rather than by a whole page of tabs. I find the current implementation inconvenient because I loose track of my files when the whole row of tabs change at once.
Good stuff!
