Mouse is always stuck inside the window.

[ghost]

Currently, when windowed, there seems to be no way to free the mouse without WM intervention (e.g. alt+tab as tested with Gnome).

Expected: Whenever the mouse is not driving the 3D camera directly (and the cursor is displayed), it should be able to leave the game window. This would especially mean all menus, such as the main menu or pause menu (esc in-game).

In case some users prefer the current behavior, an option to toggle this is suggested. Unfortunately I cannot test with multiple monitors.