Qt: stop all game list threads before updating

[Megamouse]

• Stop all game list threads before updating rpcs3

maybe fixes #16789

[FarmerJoe7355]

Does this fix the reported issue?

[Bobble80]

Does this fix the reported issue?

No. Issue was never fixed and is still present in current version of RPCS3.
Should be a relatively easy fix, as I was saying, I was wondering if the devs could tweak the RPCS3 settings slightly so that the app doesn’t search for new updates until the users game library has loaded, this would fix the issue.