In this week, a few improvements are added:
Disable the "Uninstall" button when updating plugins, because the operation may cause crashes.
Add "OK" and "Cancel" buttons. So the plugin manager tab's UI is completely the same as the old (and removed) one now. Those buttons are placed only in the plugin manager tab at the right bottom. As before, the "Cancel" button, the close button abandon current changes in Plugin Manager, and the "OK" button accepts them.