Instead of LibGUI and WindowServer building their own copies of the drawing
and graphics code, let's it in a separate LibDraw library.
This avoids building the code twice, and will encourage better separation
of concerns. :^)
Previously we were rendering the whole menubar on every compose(),
even if nothing changed about it. Now it's in its own window and can
be invalidated and painted separately.
This was pretty straightforward thanks to the work I did separating out
LibCore from LibGUI already. :^)
- WSMessageLoop now inherits from CEventLoop.
- WSMessage now inherits from CEvent.
- WSMessageReceiver goes away.
Now there is only one event loop in Serenity. Very nice!
The window frame is an object that contains a window, its title bar and
window border. This way WSWindowManager doesn't have to know about all the
different types of window borders, titlebar rects, etc.
Cooperate with the compiler to generate and execute the _init_array list
of constructor functions on userspace program statup. This took two days
to get working, my goodness. :^)
