Hides toolbar upon using fullscreen and rendering to main window.

[archshift]

This hides the toolbar only when in fullscreen and rendering to the main window.

[shuffle2]

lgtm

[OussamaDanba]

This partially restores behaviour before PR726. The toolbar is gone now however the menu bar stays visible.

Note: This only happens with Render to Main Window enabled.

[archshift]

I'm going to pull the infamous It'sAFeature™ card here, and say that this should be the intended behavior for when you use Render to Main Window as well as Fullscreen. It provides easy access to the (very useful) menu bar even while in fullscreen, without having to alt-tab.

[archshift]

I've added another commit disabling the toolbar toggle button in Fullscreen with Render to Main Window.

[OussamaDanba]

LGTM

[neobrain]

Can you fix the PR summary to not sound like this PR hides the toolbar in windowed render2main window?

[RachelBryk]

Menu and status bar really really should not be visible in fullscreen. If you want to see these things you shouldn't use fullscreen. The entire point of fullscreen is to hide everything other than the game.