Sharper more consistent icons.
Merge pull request #41 from 0rAX0/master

Icon fixes from Reda Lazri
Merge https://github.com/jokerdino/mechanig
Fixed some more minor papercuts.
Added Scrollbar settings support; fixed bug on Desktop > Icons.
Added icon for Desktop > Scrollbars
Added natural scrolling and multitouch scrolling options to Desktop > Scrolling; fixed bugs.