Enable combining tabs "Game info" and "Simulation"

[Kjarrval]

Feature suggestion: Enable the user to combine the information of the "Game info" tab and "Simulation" tab into one tab. For those with wide screens, it will get rid of the need to switch between tabs and utilises the (wide) screen even more. Currently, the selections in Game info will reset when switching between them (which can be annoying) and this will presumably negate that.