VST crashes LMMS on removal

### System Information Opensuse Tumbleweed, KDE Plasma 6.7.5 ### LMMS Version(s) 1.3.0-Alpha 2 Appimage ### Most Recent Working Version _No response_ ### Bug Summary When removing a VST2 plugin from a track, if the settings dialog is open for it then it crashes the program. ### Expected Behaviour The VST2 should be removed without incident. ### Steps To Reproduce Add a VST2 effect to a track Open the setting dialog the effect Remove the VST2 effect. ### Logs Click to expand ### Screenshots / Minimum Reproducible Project https://github.com/user-attachments/assets/a8c164f9-e635-4e79-b3d5-85f59a6f2b90 ### Please search the issue tracker for existing bug reports before submitting your own. - [x] I have searched all existing issues and confirmed that this is not a duplicate.