Updates tinymce editor to v4.1.6
Fixes some issues/quirks related to CKEditor; now ensures image size is transferred to insert image (only if using elFinder), also transfers 'alt' from file manager; updates/fixes text inline editor views w/CKEditor to use new insert image widget like rest of dialogs do [#1225]
Updates DataTables bootstrap3 support files
Updates manage users view to allow sorting by 'is admin'