Fix expandable windows with user data doesn't show correctly

Before this fix when we clicked on user data icon (to expand the window and show the user data), the expanded window were displayed incorrectly (some parts black, and other with an incorrent widget size).

src/ui/window.cpp

@@ -367,6 +367,7 @@ void Window::expandWindow(const gfx::Size& size)
     gfx::Rect frame = nativeWindow->frame();
     frame.setSize(size * scale);
     nativeWindow->setFrame(frame);
+    setBounds(gfx::Rect(bounds().origin(), size));
 
     layout();
     invalidate();