fixes #6950 add new website link works now

plugins/MultiSites/angularjs/dashboard/dashboard.controller.js

@@ -20,6 +20,7 @@
         $scope.date = piwik.broadcast.getValueFromUrl('date');
         $scope.url  = piwik.piwik_url;
         $scope.period = piwik.period;
+        $scope.currentIdSite = piwik.broadcast.getValueFromUrl('idSite');
 
         $scope.sortBy = function (metric) {
 

plugins/MultiSites/angularjs/dashboard/dashboard.directive.html

@@ -79,7 +79,7 @@
 
         <tr ng-if="hasSuperUserAccess">
             <td colspan="8" class="add_new_site">
-                <a href="{{ url }}?module=SitesManager&action=index&showaddsite=1&period={{ period }}&date={{ date }}">
+                <a href="{{ url }}?module=SitesManager&action=index&showaddsite=1&period={{ period }}&date={{ date }}&idSite={{ currentIdSite }}">
                     <img src='plugins/Morpheus/images/add.png' alt=""/> {{ 'SitesManager_AddSite'|translate }}
                 </a>
             </td>