Maximizing in windowed mode

It would be nice to be able to maximize the window when in windowed mode. I just realized that this is possible by right-clicking the Renoise window in the task bar. However it doesn’t take toolbars and other sticky windows into account (ICQ or Trillian for example which I usually have to the right on my screen), it just maximizes to the entire screen. It would also be good to maximize by double clicking the title bar (top of Renoise where you move the window).

Btw, is window size not saved when exiting? Or do you have to do this manually? I haven’t found a setting for this yet…