Description - bring back the ability to clear lazy loaded mboxes and hosts in the UI. This used to exist in the classic interface. We have many inactive mbox and when using the form editor, it's easy to select the wrong mbox.
Why is this feature important to you - It will make the interface easier to use and less likely to for new users to target from using the wrong mbox.
How would you like the feature to work - add 2 buttons "clear hosts" and "clear mboxes". Clicking the buttons would clear the current lists and we would need to wait for lazy loading to fill the lists again.
Current Behaviour - this feature doesn't exist
