Brief summary of issue / Description of requested feature:

Any userWindows of a profile should close at the same time when you close the profile.

Steps to reproduce the issue / Reasons for adding feature:

1. Open any profile A. Type lua openUserWindow("crash test dummy")
2. Open any other profile B. Click red X button at profile A to close it.
3. The userWindow is still visible. Close it with the grey X button. Mudlet crashes.

Error output / Expected result of feature

3. The userWindow should vanish with profile A simultaneously. It works for profile A's map.

Extra information, such as Mudlet version, operating system and ideas for how to solve / implement:

Mudlet 3.22.1 on Win10
Earlier attempt to fix this in #2597