BUG 6525 Add a "Last Name" column to the screen to assign users to groups

the problem was solved adding the grid resize option

workflow/engine/templates/groups/groupsMembers.js

@@ -438,6 +438,7 @@ GridByDefaultP = function(){
 
 //edit members action
 EditMembersAction = function(){
+  assignedGrid.setWidth(Ext.getBody().getWidth(true));
   availableGrid.show();
   buttonsPanel.show();
   editMembersButton.disable();