Removed drawer directive from main.html root.
Rudimentary swipe from left to right close editor:
 * register editor to Snap.js and use it as a dragger element
 * removed data-snap-ignore HTML attribute from editor
Added comments on forked lines in snap.js. See ad9b18bed492a8c9b358f611ac70e1a9b8e7b730.
JSHint.