(js) Rollback optimization in appointment editor

There's an issue with the sgToggleGrid directive when the associated
grid list is rendered later.

Fixes #4858

UI/Templates/SchedulerUI/UIxAppointmentEditorTemplate.wox

@@ -213,7 +213,7 @@
             </md-button>
           </div>
           <div flex-offset="5"
-               ng-if="editor.showRecurrenceEditor">
+               ng-show="editor.showRecurrenceEditor">
             <var:component className="UIxRecurrenceEditor" />
           </div>
           <!-- end repeat -->