style(ui): fix extra space in widget-header

app/directives/widget-header.js

@@ -8,7 +8,7 @@ angular
       icon: '@'
     },
     transclude: true,
-    template: '<div class="widget-header"><div class="row"><div class="pull-left"><i class="fa" ng-class="icon"></i> {{title}} </div><div class="pull-right col-xs-6 col-sm-4" ng-transclude></div></div></div>',
+    template: '<div class="widget-header"><div class="row"><span class="pull-left"><i class="fa" ng-class="icon"></i> {{title}} </span><span class="pull-right col-xs-6 col-sm-4" ng-transclude></span></div></div>',
     restrict: 'E'
   };
   return directive;