https://github.com/anoM4n/LSS-…in/QuickFilterFix.user.js
Doesn't do much, it's just a few lines of code, so don't expect miracles, but it seem to solve some critical bugs while we wait for the real patch.
1) Prevents the mission list being saved to the server, so you can maintain personal list and alliance list in separate windows
2) Prevents the selected filter from being saved to the server
3) Tries to override the "reSort" function that is triggered at every single missionMarkerAdded, leading to intense computations being triggered constantly.
Makes a much more stable game, and will be deleted when the fix is out.