window: ignore resize increments for maximized/fullscreen
window: ignore resize increments for maximized/fullscreen

Once a window is maximized/fullscreen, resize increments should be
ignored otherwise the window may appear smaller than the screen size.

That also applies to configure requests as well.

https://bugzilla.gnome.org/show_bug.cgi?id=751368

alexlarsson/gtk,alexlarsson/gtk,grubersjoe/adwaita,grubersjoe/adwaita,alexlarsson/gtk,alexlarsson/gtk,alexlarsson/gtk,grubersjoe/adwaita,grubersjoe/adwaita,grubersjoe/adwaita,grubersjoe/adwaita,grubersjoe/adwaita,alexlarsson/gtk,grubersjoe/adwaita,alexlarsson/gtk,alexlarsson/gtk