Problem this feature should fix
Some settings exposed in the menu bar (i.e. grid color, background color...) aren't exposed in the EditorSettings. This prevents us from properly serializing/deserializing them.

Expected solution
We should make sure all the editor settings available through the editor menus (mainly menu bar), are stored in EditorSettings, and properly saved (following #329)

Additional Info
Most of these missing settings can be found in here:
(https://github.com/adriengivry/Overload/blob/8892ec503e25f28982fe5a2046f68b742e3846fd/Sources/Overload/OvEditor/src/OvEditor/Panels/MenuBar.cpp#L70-L149)