GUAC-1120: Use flex layout for headers containing the user menu.

guacamole/src/main/webapp/app/manage/templates/manageConnectionGroup.html

@@ -22,11 +22,11 @@ THE SOFTWARE.
 
 <div class="view" ng-class="{loading: !isLoaded()}">
 
-    <!-- User menu -->
-    <guac-user-menu permissions="permissions"></guac-user-menu>
-
     <!-- Main property editor -->
-    <h2>{{'MANAGE_CONNECTION_GROUP.SECTION_HEADER_EDIT_CONNECTION_GROUP' | translate}}</h2>
+    <div class="header">
+        <h2>{{'MANAGE_CONNECTION_GROUP.SECTION_HEADER_EDIT_CONNECTION_GROUP' | translate}}</h2>
+        <guac-user-menu permissions="permissions"></guac-user-menu>
+    </div>
     <div class="section">
         <table class="properties">