Added Fullscreen menu item and enabled Quit menu item.
Removed Fullscreen.

Fullscreen was only affecting the actual editor not the file tree due to them being in different files.
Reenabled fullscreen with version check for v27
Added Import Folder and Import File, also added Rename code by Janpotoms
Fixed bug where file would not be imported unless folder was selected
Merge pull request #8 from minimattapps/chrome-app

Added Fullscreen menu item and enabled Quit menu item, also allowed Importing Files and Folders