Fix spacing under Add buttons

gui/index.html

@@ -164,8 +164,10 @@
             </div>
           </div>
         </div>
-        <button class="btn btn-sm btn-default pull-right" ng-click="addRepo()"><span class="glyphicon glyphicon-plus"></span>&emsp;<span translate>Add Repository</span></button>
-        <div class="clearfix"></div>
+        <div class="form-group">
+          <button class="btn btn-sm btn-default pull-right" ng-click="addRepo()"><span class="glyphicon glyphicon-plus"></span>&emsp;<span translate>Add Repository</span></button>
+          <div class="clearfix"></div>
+        </div>
         <hr class="visible-sm"/>
       </div>
 
@@ -284,8 +286,10 @@
             </div>
           </div>
         </div>
-        <button class="btn btn-sm btn-default pull-right" ng-click="addNode()"><span class="glyphicon glyphicon-plus"></span>&emsp;<span translate>Add Node</span></button>
-        <div class="clearfix"></div>
+        <div class="form-group">
+          <button class="btn btn-sm btn-default pull-right" ng-click="addNode()"><span class="glyphicon glyphicon-plus"></span>&emsp;<span translate>Add Node</span></button>
+          <div class="clearfix"></div>
+        </div>
       </div>
     </div> <!-- /row -->