fixed unclosed selected html tag (caused issue with optimized build version so…

fixed unclosed selected html tag (caused issue with optimized build version so no options where shown in graph edit tabs)

src/app/panels/graphite/module.html

@@ -32,7 +32,7 @@
           <div class="section">
             <div class="editor-option">
               <label class="small">Datasource</label>
-              <select class="input-large" ng-options="obj.value as obj.name for obj in datasources" ng-model="panel.datasource" ng-change="datasourceChanged()" />
+              <select class="input-large" ng-options="obj.value as obj.name for obj in datasources" ng-model="panel.datasource" ng-change="datasourceChanged()"></select>
             </div>
           </div>
         </div>