Merge pull request #15 from jokerdino/devel

Fixed lp:1098845
Removed 'Reload Unity' option.
Changed the symbolic icon for Appearance so we're not using a Gnome one.
Removed WIP webapps UI stuff for merge.
Merge pull request #16 from snwh/devel

Fixed some things; changed Appearance-related icons.
Added WIP webapps UI stuff for merge.
Merge branch 'devel' of https://github.com/freyja-dev/unity-tweak-tool into devel
Fixed peculiar backwards time format bugs.
Removed WIP webapps UI stuff for merge.
Merge pull request #17 from snwh/devel

Fixed backwards time format behaviour bug; fixed tooltips.
Prevent UTT from crashing upon missing schemas