CMS-3400 Difficult to drag FormItemSet
Fixed problem that caused whole FormItemSetView to be disabled for focus in FireFox.
CMS-3412 Image Picker - Add support for bulk operations

- also created .button-background() mixin to create colourful buttons
CMS-3412 Image Picker - Add support for bulk operations

- also created .button-background() mixin to create colourful buttons
- moved checkbox to the left
CMS-3437 After setting descriptor on a PageComponent the page scrolls to the bottom
CMS-3443 Giving DisplayName in WizardHeaderWithDisplayNameAndName does not work
Changed ContentTypeSummary.hasContentDisplayNameScript to check if string is blank
CMS-3412 Image Picker - Add support for bulk operations

- also created .button-background() mixin to create colourful buttons
- moved checkbox to the left
- refactored all addXXXListeners to onXXXed
CMS-3444 Not able to create content within a Site of a type not supported by any PageTemplate
Made PageTemplateResource.getDefault return null if no supporting page template found
Made JsonResponse return null if no result
Made GetDefaultPageTemplateRequest return null if response contained no result
Added support for duplicating any component in live-edit.
Fixed the liveEdit save bug.
Merge pull request #725 from enonic/CMS-3328

Added support for duplicating any component in live-edit.
Merge branch 'master' into CMS-3310