... is created or updated; there is already a SwUpdateAttr
hint being sent from SwRangeRedline::InvalidateRange(),
but it doesn't contain any info about the redline other than the
position; add a new hint sw::RedlineDelText and send it from there in
addition to the existing one.

Change-Id: I37150b2a5ca6a0e70ea4a5788f720f8522227631