Also introduce an async task queue.

Move the dummy parent window from (-1, -1) to (0, 0) so that the window is considered visible by
Wayland. The X11 window region is set to an empty rectangle so that the window is still in fact
invisible. If Xshape support is not compiled in, then fall back to using (-1, -1).

This fixes poor performance when running Office 2016 on Xwayland. It's caused by glXWaitForSbcOML()
in glxdrv_wglSwapBuffers() taking 1 second every time it gets called. The timeout is from
TIMER_LEN_FLIP (1000ms) in xwl_present_reset_timer() in the xserver source code hw/xwayland/xwayland-present.c.
Xwayland doesn't actually know when a frame is visible on screen[1][2]. It relies on a timer to
simulate the process and when the window is invisible it uses a timer with a 1000ms timeout. This
patch makes the dummy parent window visible so that Xwayland will use the timer with a 17ms timeout(~60fps),
which also means that there will still be a 60fps limit for some windows when running on Xwayland.

[1]: https://gitlab.freedesktop.org/xorg/xserver/-/issues/971
[2]: https://gitlab.freedesktop.org/xorg/xserver/-/issues/973

Holding the BindStatusCallback ref is not enough; Abort can end up calling
OnStopBinding which intentionally removes the binding and releases its
ref. urlmon's Abort will then have a use-after-free when accessing the
state to set BINDING_ABORTED, if it was destroyed.
Signed-off-by: Gabriel Ivăncescu <gabrielopcode@gmail.com>

Knowing the content of the edit field is more useful than knowing the
strcmp() result. The text field may contain carriage returns and
linefeeds so use wine_dbgstr_a() so they are clearly visible in the
failure message.
Also prefix the ok messages with a unique string to indicate which
test_WM_PASTE() test failed.

A missing API is a todo in Wine.

A missing API is a todo in Wine.