(js) Improve event editor (attendees list)

Respect SOGoSearchMinimumWordLength and hide detailed view after
deleting the last attendee.

UI/Templates/SchedulerUI/UIxAppointmentEditorTemplate.wox

@@ -211,7 +211,7 @@
         </div>
         <!-- attendees -->
         <div class="sg-form-section">
-          <div layout="row" layout-align="start start">
+          <div layout="row" layout-align="start center">
             <md-icon>search</md-icon>
             <md-autocomplete class="md-flex"
                              label:md-floating-label="Invite Attendees"
@@ -220,7 +220,7 @@
                              md-selected-item-change="editor.addAttendee(card)"
                              md-items="card in editor.cardFilter(editor.searchText)"
                              md-item-text="card.empty"
-                             md-min-length="3"
+                             var:md-min-length="minimumSearchLength"
                              md-delay="300"
                              md-no-cache="true"
                              sg-enter="editor.addAttendee(editor.searchText)">
@@ -237,6 +237,7 @@
             </md-autocomplete>
             <md-button type="button" class="sg-icon-button"
                        label:aria-label="repeat_CUSTOM"
+                       ng-show="editor.component.attendees.length"
                        ng-click="editor.toggleAttendeesEditor()">
               <md-icon ng-class="{'md-rotate-180': editor.showAttendeesEditor}">expand_more</md-icon>
             </md-button>
@@ -255,7 +256,7 @@
               <md-icon ng-class="'icon-' + $chip.status"><!-- partstat --></md-icon>
               <md-icon class="sg-chip-remove"
                        label:aria-label="Delete"
-                       ng-click="editor.component.deleteAttendee($chip)">close</md-icon>
+                       ng-click="editor.removeAttendee($chip)">close</md-icon>
             </md-chip-template>
           </md-chips>
           <div ng-show="editor.showAttendeesEditor" class="attendees">

UI/WebServerResources/js/Scheduler/ComponentController.js

@@ -159,6 +159,7 @@
     //vm.searchText = null;
     vm.cardFilter = cardFilter;
     vm.addAttendee = addAttendee;
+    vm.removeAttendee = removeAttendee;
     vm.addAttachUrl = addAttachUrl;
     vm.cancel = cancel;
     vm.save = save;
@@ -218,6 +219,12 @@
       }
     }
 
+    function removeAttendee(attendee) {
+      vm.component.deleteAttendee(attendee);
+      if (vm.component.attendees.length === 0)
+        vm.showAttendeesEditor = false;
+    }
+
     function save(form, options) {
       if (form.$valid) {
         vm.component.$save(options)