When the game crashes, the mod doesn't unload every resourcepack

[CalXee]

Describe the bug
If you crash, the mod won't unload all non-vanilla loaded resourcepacks. This means, if you crash because of a broken shader setting, the game will constantly try to reload the broken shader, meaning you cannot click the "return to title screen" button on the crash screen.

To Reproduce
Steps to reproduce the behavior:

1. Install the attached broken version of Sildur's Shaders I tried to edit, don't forget to turn on Fabulous graphics mode. BROKEN Sildurs fabulous shaders v1.0.zip