Omnibar:
 * added note and task edit to omnibar
 * changed omni-button omnibar input label to button
 * omni button :hover and :active colors
 * removed unused omnibarFeature scope variable from dashboardDirective
 * moved omnibar code from ItemsController to OmnibarController
 * moved omnibar keyword code from NotesController to OmnibarController
 * set showDateInput false on dateInputDirective $destroy event
 * initialize newKeyword object in NotesController
 * removed note and task edit
 * removed featureChangedCallback from NotesController and TasksController
 * refactoring