riched20: Add the ability to CharFromPoint to either pick the closest leading edge or the leading edge of the selected character.

[Huw Davies]

---
 dlls/riched20/caret.c  |  4 ++--
 dlls/riched20/editor.h |  3 ++-
 dlls/riched20/run.c    | 55 ++++++++++++++++++++++++++++----------------------
 dlls/riched20/wrap.c   | 35 +-------------------------------
 4 files changed, 36 insertions(+), 61 deletions(-)

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