Save settings prompt for multi-model view does not work

[FrederikPM]

Reproduce by:

1. Edit a multi-model setting, e.g. an initial parameter value.
2. Navigate to another view, e.g. another multi-model view without clicking save (choose any option from the prompt).
3. Any settings input in any multi-model view is now locked.
4. Make the app lose focus, e.g. by clicking on the desktop - the settings input can now be used again.

Additionally:

• The prompt is now gone.
• The user can navigate between multi-models view without the save button changing state to "edit".
• The view state of the 'Connections' and 'Initial values of parameters' settings erroneously "carries over" between views although they are, correctly, not applied in the given view when pressing the save button.