issues with change tracking

[Edwin Leuven]

if i creat a selection that spans more than one line and then type 
something (so that the selection gets replace with my new text), the 
selection before the line where cursor is isn't crossed out. there is a 
missing screen update here.

second thing is when i delete a collapsed footnote. the collapse 
footnote gets crossed out in lyx but not the text inside. in the dvi the 
footnote isn't crossed out.