added j3.TextFormItem
Added j3.Collection::setActiveById(id, options)
Fixed bug: j3.DropdownList didn't refresh after itemsDatasource item added or removed.
Added j3.DropdownList::onCommand(commandArgs) hook
rename dd.coffee to drag.coffee; improve j3.Drag
Added j3.View::toggleVisible()
Merge branch 'feature-form-text-item' into develop