use btn instead of span for label save, allow save on enter

beat/web/reports/static/reports/app/directives/editableLabel.js

@@ -50,8 +50,8 @@ angular.module('reportApp').directive("editableLabel", [function(){
 			class='form-control'
 			placeholder='A label...'
 			ng-model='obj[field]'/>
-		<span class='input-group-addon' ng-click='toggleEditingGroupName()' style='cursor: pointer;'>
-			Save
+		<span class='input-group-btn' ng-click='toggleEditingGroupName()'>
+			<button type='submit' class='btn btn-default'>Save</button>
 		</span>
 	</span>
 </form>