This should have been part of e01d56f3.

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.