crecord: re-center display in interactive curses commit on pageup/down A long-standing issue in the crecord (interactive curses commit interface) is that using PageUp/Down to move along longer-than current screen size chunks would "lose" the cursor and not properly re-center. There has been self.recenterdisplayedarea() to do that, but it has not been in use for some reason. Add calls to the appropriate uparrowshiftevent() and downarrowshiftevent() methods to fix this.