[ISSUE] telegram-desktop v5.10.2_1: Program process doesn't get shut down when closing the application. Maybe upstream bug.

[gc-user <gc-user@users.noreply.github.com>]

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New issue by gc-user on void-packages repository

https://github.com/void-linux/void-packages/issues/53994

Description:
### Is this a new report?

Yes

### System Info

Void 6.12.9_1 x86_64 GenuineIntel uptodate hold rrmDDDDDDDDFFFFFFFFF

### Package(s) Affected

telegram-desktop-5.10.2_1

### Does a report exist for this bug with the project's home (upstream) and/or another distro?

Not that I'm aware of.

### Expected behaviour

The program should be closed / shut down when clicking "X", which it did in previous versions.

### Actual behaviour

The program is just removed from task bar, but still keeps running "in the background", which can be checked using a task manager or "top" etc.

Essentially the program behaves like "close into tray" - only that such an option is not available and "show tray icon" is not enabled.

### Steps to reproduce

1. Open telegram-desktop v5.10.2_1
2. Make sure that the settings under "Advanced" -> "System integration" only have "show taskbar icon" enabled.
3. Close telegram
4. See the taskbar icon gone, but the program still showing up as running in task manager or top etc. as still running.

I noticed an "exit" command in the desktop file, but not sure what to make of that and if that isn't working as it's supposed to. That's why I decided to open an issue here first instead of upstream.