fix pagination

frontend/app/components/routing/wp-list/wp-list.controller.ts

@@ -104,7 +104,7 @@ function WorkPackagesListController($scope,
       apiWorkPackages
         .list(json.meta.page, json.meta.per_page, json.meta.query)
         .then((workPackageCollection) => {
-          mergeApiResponses(json, workPackageCollection.getElements());
+          mergeApiResponses(json, workPackageCollection);
           setupPage(json, !!queryParams);
 
           QueryService.loadAvailableUnusedColumns($scope.projectIdentifier).then(function(data){
@@ -235,20 +235,24 @@ function WorkPackagesListController($scope,
           .list(json.meta.page, json.meta.per_page, json.meta.query)
           .then((workPackageCollection) => {
             // Copy V3 group/sum response into experimental format
-            mergeApiResponses(json, workPackageCollection.getElements());
+            mergeApiResponses(json, workPackageCollection);
             setupWorkPackagesTable(json);
         });
       });
   }
 
   function mergeApiResponses(exJson, workPackages) {
-    exJson.work_packages = workPackages;
+    exJson.work_packages = workPackages.elements;
 
     if (workPackages.totalSums) {
       exJson.meta.sums = exJson.meta.columns.map(column => workPackages.totalSums[column.name]);
     } else {
       exJson.meta.sums = new Array(exJson.meta.columns.length);
     }
+
+    // TODO: no longer use detour over $source once the properties are available
+    // directly on the CollectionResource
+    exJson.meta.total_entries = workPackages.$source.total;
   }
 
   // Go