to correctly position their preedit window.
- un-optimise the line clearing on newly scrolled-in lines a bit: the
former reasoning was that any fg colour on default bg looks the same
- in empts spaces, but thats not true when reversing (e.g. selection),
+ in empty spaces, but thats not true when reversing (e.g. selection),
so also check for matching fg colours. This fixes the problem where
selecting newly scrolled-in lines would exhibit wrong colours.
- fix a bug in the perl interface causing focus in events to generate