Menu bar is not visible in fullscreen

[trigger-segfault]

Describe the issue

In fullscreen mode, the menu bar does not render and cannot be interacted with. Using the OpenLRR hotkey Alt+M to toggle the menu has no effect either.

The menu only because function when fullscreen is partially exited by Alt-tabbing.

Steps to solve

Multiple steps will need to be taken to ensure the fullscreen experience remains the same:

• The menu bar should not reduce the available height for the game client area.
• The menu bar cannot shift the game client area down like with windowed mode.
• The menu bar should preferably only appear when the mouse is hovered over the top of the screen, or appear via a hotkey.

Alternatively, the menu could be disabled altogether in fullscreen, as it's primarily a debugging tool (though debugging in fullscreen is also important).