JOC Cockpit should not hang when expanding all folders and switching to a different state

Current Situation

• A user reports the following behavior: "When choosing the Jobs tab, expand all folders to display all jobs, then switch to the running/stopped state and then backup to pending/all jobs, the browser hangs. With a non expanded job tab it works, as long only 1 directory is displayed.

Desired Behavior

• If a user doesn't wait for all items (jobs, job chains, orders) to be displayed after an "expand all" operation but switches to some other operation then the GUI should not hang.