Display total sums regardless of grouping option

app/assets/javascripts/angular/directives/work_packages/work-packages-table-directive.js

@@ -27,7 +27,6 @@ angular.module('openproject.workPackages.directives')
       scope.grouped = scope.groupByColumn !== undefined;
       scope.groupExpanded = {};
 
-      scope.displaySums = scope.displaySums && scope.grouped; // only display sums when rows are grouped
     }
   };
 }]);

public/templates/work_packages/work_packages_table.html

@@ -110,7 +110,7 @@
 
     <tr work-package-group-sums
         ng-repeat-end
-        ng-if="displaySums &&
+        ng-if="displaySums && grouped &&
                ($last || row.groupName !== rows[$index+1].groupName)"
         ng-show="!grouped || groupExpanded[row.groupName]"
         ng-class="[