Filter dialog doesn't refer to folder names consistently

[djast]

Describe the bug
When a system folder has a different name on the server (e.g., system folder Spam using the server folder Junk), the Filters interface does not display the folder names consistently.

To Reproduce
Steps to reproduce the behavior:

1. Go to Settings -> Filters
2. Click on "rainloop.user" and add a filter with the action "Move to Spam"
3. Click Done
4. Observe that the "Edit Script: rainloop.user" dialog shows:
   filtername (Move to "Junk")
   and not
   filtername (Move to "Spam")

Expected behavior
The folder name should be referred to in a consistent manner.

Since the user could change their system folder associations after creating the filter, the Filters "Move To" action should probably always report the folder name on the server, either instead of or in addition to the "system folder" name (e.g. the option in the Move To menu should be "Junk (Spam)" rather than just "Spam", the same way as it's displayed in Settings -> Folders). The folder name should perhaps also be displayed the same way in the "Edit Script:" dialog.

Please complete the following information:

• Browser: Firefox 102
• IMAP daemon: dovecot
• PHP version: 7.4.33
• SnappyMail Version: 2.27.3
• Mode: standalone; also https://snappymail.eu/demo

Additional context
Add any other context about the problem here.