On windows, including desktop_multi_window causes a crash when attempting to exit the application by clicking on the OS's "close" button (the X in the upper-right hand corner).

Reproduce Steps

1. flutter create glorp
2. cd glorp
3. edit pubspec.yaml, adding "desktop_multi_window: ^0.2.0" in dependencies
4. flutter run
5. (pick windows, that is, not edge)
6. Wait for window to launch/stabilize
7. Close by clicking on the X in the upper-right corner
8. Get windows error dialog: "glorp has stopped working. A problem caused the program yada yada yada"

Expected behavior

No windows error dialog

Version (please complete the following information):

• Flutter Version: 3.7.7
• OS: Microsoft Windows 10 Home, version 10.0.19044
• plugin: desktop_multi_window 0.2.0