ENYO-1875: fix missing gray groupbox line around slider
-added groupbox around device and orientation buttons
ENYO-1875: Move device picker in its own kind to reduce indent depth
ENYO-1875: added reload method

The kind keeps tracks of iframe url and geometry
ENYO-1875: preview now keeps track of current zoom factor
ENYO-1875: added reload button
ENYO-1875: added reload icon
Merge pull request #198 from enyojs/ENYO-1875

Enyo 1875: added preview reload button