IMR_QUERYCHARPOSITION is one of optional but fundamental request
message sent from IMEs to application. This message is used for
retrieving the positional information for each character in a
composition text especially when the composition text is drawn
by the application.
This information is critical for IMEs to align suggestion window
with the composition text.

Change-Id: I53a344a78688060004cc8bcbbf1127f22a468e20
Reviewed-on: https://gerrit.libreoffice.org/3849Reviewed-by: Tor Lillqvist <tml@iki.fi>
Tested-by: Tor Lillqvist <tml@iki.fi>