ENYO-3831: regroup some designer-toolbar items together within FittableColumns to manage them as an unique block. Add screen orientation. Enhanced the screen sizing customization
ENYO-3831: improve code readability
Merge branch 'master' into ENYO-3831
Merge branch 'master' into ENYO-3831
Merge pull request #778 from enyojs/ENYO-3831

ENYO-3831: new designer toolbar
Merge branch 'ENYO-3805' into ENYO-3784