[Applets] Use _appletLabel.set_text instead of _appletLabel.clutter_text.set_text. Prevents "shadows" when text changes
The fix is by Lusito who is too lazy to make a pull request for such a small change :)
Merge pull request #1733 from dalcde/applet-work2

Fix #1262
Merge remote-tracking branch 'upstream/master'

Conflicts:
	js/ui/applet.js
[Alt-Tab] Handle more keyboard events on key-release.