Added group description
Make use of lexicon strings
Make description optional (copy/paste error :x)
Removed unnecessary Smarty template + make use of anchor layout to grids resize correctly when viewport is changing
Remove not yet translated French translation
Add required 'description' field in grid store
Removed hard coded Tag/Group windows height
Removed hard coded windows height (again)
Added group description

Conflicts:
	assets/components/tagger/js/mgr/widgets/group/group.window.js