If there were spelling errors in a text portion that is to be
accepted/rejected, right mouse click just shown the spellcheck menu, so
oddly if an inserted text contained spelling mistakes and we wanted to
reject them, Writer didn't allow that.

Fix this by adding the redline operations (accept change, reject change,
next change, previous change) to the spellcheck menu, but make it only a
wrapper around the SwView code, so all the logic on what to do and when
to hide these menu items is not duplicated.

Change-Id: I76cad2f58a47575f8ef9517af51f1ffe7c4b6844