sw_redlinehide_4b: FindText() adapt the replace part as well
When redlining is enabled, the result will be a delete redline for the
existing text, and an insert redline for the new text; that much is
obious (and ReplaceRange can deal with a selection larger than one
SwTextNode easily, since it mostly adds redlines).
For the case when redlining is disabled, there are 2 options,
and i don't really know which is preferrable from UX point of view:
One approach is to reuse GetRanges() to ignore delete redlines in
the replace range; move its declaration to different header.
Another approach is to DeleteAndJoin() the existing delete redlines,
which is the same as the previous model based Hide mode,
which calls DeleteRedline() to remove the hidden redlines.
Also change ChgAutoCorrWord() to call DeleteSelImpl() directly.
Change-Id: I5974409d09eb39e04cc0b5dfc20d4db510e1cf58