admin/anyplugins - dropzone

a new plugin that will turn a selector into a file dropzone for adding
media to the media library.  currently built into new images panel in
product editor.
admin - enhancements to domain chooser

Fixed the issue w/ last used domain not auto-selecting itself.
Optimized domain chooser by using event delegation.
Upgraded domain chooser to show only 'favorite' domains unless no
domains are favorite, then all are displayed.