#999 Delete ch.instances collection.
#1000 Expose  and  instead of .
Update mobile view.
#1001 Add a method to destroy widgets.
#1001 Create tests to method destroy: Calendar, Countdown, Expandable, Menu, Tabs, Validation.
#1001 Update destroy method on Calendar, Dropdown, Menu, Popover, Tabs, Caorousel and remove _snippet from Widget.
merge