Cursor movement at RTL-LTR boundary

[Dov Feldstern]

Stefan --- now that you're an expert on cursor movement and boundary and 
all, do you think you could tackle a small remaining problem with bidi 
cursor movement, which I think is very much connected with what you've 
been working on here? I just created a new bug for it in bugzilla: 
http://bugzilla.lyx.org/show_bug.cgi?id=3754

Certainly, don't hold up your patch for this (the behavior I describe is 
both before and after your patch), but if you could take a look at it, I 
would appreciate it.

Thanks!
Dov