Removing of remote schedulers in process class does not work

Description
When a process class has a list of remote JobSchedulers and one of them is selected. Then click the remote host button does remove the selected entry from the table list in the gui but the item still exists in the xml that can be shown with the comman show_xml.
Desired behaviour
When clicking the remove host button, the selected item should be deleted from the table list in the gui and from the xml