MCDev cannot be properly unloaded

[RedNesto]

Plugin version: 2020.3-1.5.1-194 (and all dynamic versions) IntelliJ version: 2020.3 EAP 4 Operating System: Windows 10 (19041.572)

Even though the platform thinks the plugin can be unloaded, it fails to (I'm almost certain this is because of memory leaks.)

After the unload attempt the IDE may enter in a weird state and I usually end up restarting the IDE anyway. An example is the complete log in #789, all the java.lang.ClassNotFoundException: com.demonwav.mcdev.inspection.IsCancelledInspection errors appear after updating the plugin (and the unload was attempted.)