removed metrics tab in dash editor modal (only created confusion, the feature is not ready)

src/app/partials/dasheditor.html

@@ -2,7 +2,7 @@
   <div class="pull-right editor-title">Dashboard settings</div>
 
   <div ng-model="editor.index" bs-tabs style="text-transform:capitalize;">
-    <div ng-repeat="tab in ['General', 'Rows','Controls', 'Metrics', 'Import']" data-title="{{tab}}">
+    <div ng-repeat="tab in ['General', 'Rows','Controls', 'Import']" data-title="{{tab}}">
     </div>
     <div ng-repeat="tab in dashboard.current.nav" data-title="{{tab.type}}">
     </div>