The call to ME_SendSelChange cannot be done in ME_CommitUndo like it was
before, because it must be done after wrapping.  Native richedit controls
send EN_CHANGE first, which is sent in ME_UpdateRepaint, so
ME_SendSelChange must be before this notification in ME_UpdateRepaint.

Revert commit 049cf5ac
richedit: Avoid notifying parent window in improper state.

The commit was meant to fix a problem caused by ME_SendSelChange being
called in ME_SendSelChange, but moving the calls to ME_CommitUndo caused
a regression. So this patch reverts the previous commit, and my
following patch will instead fix the bug by moving the call to
ME_SendSelChange out of ME_CommitUndo.

This reverts commit 897f11d3.

LPDIEFFECT->rglDirection is a LPLONG.

This avoids switching to offscreen rendering in context_apply_blit_state() for
a depth buffer that isn't going to be used anyway. This switch would be
problematic for blits to the frontbuffer, since it's always onscreen. I.e.,
we'd be blitting to the screen, but with offscreen transforms.

I merged this by accident in be43c867.