fix(calendar(js)): prevent duplicate event creation in case of an event conflict

In case of an calendar event conflict the form submit button was not
disabled after use, allowing it to be clicked again.
This could have resulted in a double creation of the submit event.

UI/Templates/SchedulerUI/UIxAppointmentEditorTemplate.wox

@@ -7,7 +7,7 @@
   <md-dialog 
   flex="{{ editor.isFullscreen?    100 : 60 }}"
   flex-sm="{{ editor.isFullscreen? 100 : 80 }}">
-    <form name="eventForm" class="md-inline-form" ng-submit="editor.save(eventForm)">
+    <form name="eventForm" class="md-inline-form">
       <md-toolbar>
         <div class="md-toolbar-tools sg-no-transition">
           <md-icon class="material-icons sg-icon-toolbar-bg">event</md-icon>
@@ -333,6 +333,7 @@
           <var:string label:value="Reset"/>
         </md-button>
         <md-button class="md-primary" type="submit"
+                   ng-click="editor.save(eventForm)"
                    ng-disabled="eventForm.$invalid || eventForm.$submitted">
           <var:string label:value="Save"/>
         </md-button>
@@ -374,9 +375,9 @@
                    ng-click="editor.edit(eventForm)">
           <var:string label:value="Edit"/>
         </md-button>
-        <md-button class="md-warn" type="button"
+        <md-button class="md-warn" type="submit"
                    ng-click="editor.save(eventForm, { ignoreConflicts: true })"
-                   ng-disabled="editor.eventForm.$invalid">
+                   ng-disabled="eventForm.$invalid || eventForm.$submitted">
           <var:string label:value="Save"/>
         </md-button>
       </md-dialog-actions>
@@ -409,10 +410,10 @@
                    ng-click="editor.edit(eventForm)">
           <var:string label:value="Edit"/>
         </md-button>
-        <md-button class="md-warn" type="button"
+        <md-button class="md-warn" type="submit"
                    ng-show="editor.attendeeConflictError.unavailableAttendees"
                    ng-click="editor.save(eventForm, { removeAttendees: editor.attendeeConflictError.unavailableAttendees })"
-                   ng-disabled="editor.eventForm.$invalid">
+                   ng-disabled="eventForm.$invalid || eventForm.$submitted">
           <var:string label:value="Save"/>
         </md-button>
       </md-dialog-actions>

UI/WebServerResources/js/Scheduler/ComponentController.js

@@ -547,10 +547,13 @@
               $mdDialog.cancel = vm.originalModalCancel;
               $mdDialog.hide();
             }, function(response) {
-              if (response.status == CalendarSettings.ConflictHTTPErrorCode)
+              vm.allowResubmit(form);
+
+              if (response.status == CalendarSettings.ConflictHTTPErrorCode) {
                 vm.attendeeConflictError = _.isObject(response.data.message) ? response.data.message : { reject: response.data.message };
-              else
+              } else {
                 vm.edit(form);
+              }
             });
         }
       });
@@ -584,6 +587,11 @@
       form.$setDirty();
     };
 
+    this.allowResubmit = function (form) {
+      form.$setPristine();
+      form.$setDirty();
+    };
+
     function getHours() {
       var hours = [];
       for (var i = 0; i <= 23; i++) {