Description

Fixes a problem with config -set mouse_capture=nomouse command when mouse is captured, now the mouse is released (uncaptured) immediately now - I believe this is the most sane behavior.

Related issues

Fixes #3127

Manual testing

• make sure DOSBox Staging is in windowed (not fullscreen) mode
• capture the mouse (depending on configuration - usually middle click inside the window works)
• execute command config -set mouse_capture=nomouse - mouse should be released
• execute command config -set mouse_capture=onclick - mouse shouldn't get auto-captured again

Checklist

I have:

• followed the project's contributing guidelines and code of conduct.
• performed a self-review of my code.
• commented on the particularly hard-to-understand areas of my code.
• split my work into well-defined, bisectable commits, and I named my commits well.
• applied the appropriate labels (bug, enhancement, refactoring, documentation, etc.)
• checked that all my commits can be built.
• confirmed that my code does not cause performance regressions (e.g., by running the Quake benchmark).
• added unit tests where applicable to prove the correctness of my code and to avoid future regressions.
• made corresponding changes to the documentation or the website according to the documentation guidelines.
• locally verified my website or documentation changes.