Suggestion: a way to hide the experimental toolbar

[Trobador]

Thank you for your work on Ktisis.

The experimental toolbar is really practical, but I couldn't find any way to hide it without disabling it from the Settings menu. It isn't hidden when the game UI is hidden with the ~ key and there's no button to close or hide it. This means that to hide it for a screenshot, you need to open the main window if it's closed, open the settings, disable the toolbar, close the settings and close the main window, which is a bit bothersome.

This could be solved by adding a close button and/or by hiding the toolbar when the game UI is hidden.