Closing a session with a "vpd" editor opened will throw a ClassCastException

[Kellindil]

Capella 6.1.0

• Create a new capella projet (activity explorer opens automatically)
• Open an editor on any vpd file ("PV Configuration Editor" from the PVMT add-on)
• Right-click on the aird file and use "Close"

The following dialog pops up. The session is not closed. There is no associated stack trace, only that dialog.

[etraisnel2]

Seems like cases where VPDEditor is opened on a .vpd file isn't properly handled

in VirtualPvdEditor.notifySessionClosing (and more globally, all across PVMT code) , cases where input would be a FileEditorInput (editor opened on .vpd file) should be handled

In that specific case, there shouldn't even be session notification, as it's a file.
VPDEditor (or VirtualEditorInput) should track the session if was opened on, and only react to its closure

So this is 100% a PVMT bug