F2 does not hide the UI

[ncanceill]

Description
Hiding the game UI (by pressing F2) does not hide Kramax UI

Root cause
I believe GameEvents.onShowUI and GameEvents.onHideUI are not handled

Fix
Something like this:

GameEvents.onShowUI.Add(OnShowGui);
public void OnShowGui() {
    bHideUI = false;
    if (mainPilot != null) mainPilot.OnGUI();
}
GameEvents.onHideUI.Add(OnHideGui);
public void OnHideGui() {
    bHideUI = true;
    if (mainPilot != null) mainPilot.OnGUI();
}

there maybe?