Fix "trackers still on" when closing via tray

[JovannMC]

When the user chooses to minimize the app to the system tray and tries to exit the app, the "Trackers still on" warning would still appear even if all trackers were disconnected. Updates the tray code to filter the trackers correctly.

Also adds v0.13.2 to the metainfo xml file

Fixes #1264.

[FluffyOMC]

So I DID find an actual bug! Nice- Oh, and it does work :3

[JovannMC]

Haha yeah, I was very confused and tried literally every single possible combination to reproduce it and couldn't. Ended up looking into the code itself and found the inconsistency

[ButterscotchV]

This shouldn't be needed. Why are there still trackers timed out in the list even if it's properly disconnected? We don't necessarily need to show the warning, but it feels like just timed out should still be considered as "connected".

[FluffyOMC]

This shouldn't be needed. Why are there still trackers timed out in the list even if it's properly disconnected? We don't necessarily need to show the warning, but it feels like just timed out should still be considered as "connected".

Idk, I mean, all I do is flick the power switch to turn off the official slimes and... Yeah...