user32/winex11: Move CursorClip functionality from user to winex11.

[Vitaliy Margolen]

Change Log:
  user32/winex11: Move CursorClip functionality from user to winex11.

Use virtual_screen_rect this time. Drop some tests. I will add them
later to user32's tests. Also these tests pass on Windows with
multi-monitor config.
I could not reliably run tests on Wine with xinerama configuration.

---
 dlls/ddraw/tests/ddrawmodes.c     |   22 +++++++++++++++++++++-
 dlls/user32/cursoricon.c          |   13 ++-----------
 dlls/user32/driver.c              |   26 ++++++++++++++++++++++++++
 dlls/user32/user_private.h        |    2 ++
 dlls/winex11.drv/mouse.c          |   27 +++++++++++++++++++++++++++
 dlls/winex11.drv/settings.c       |    3 +++
 dlls/winex11.drv/winex11.drv.spec |    2 ++
 dlls/winex11.drv/x11drv.h         |    1 +
 8 files changed, 84 insertions(+), 12 deletions(-)
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