[Lazarus] New feature - View same source in multiple Windows

[Andrew Brunner]

> Indeed it did happen the other way round. if text was edited, above the
> viewed section,  scrolling took place (annoyingly)
> That was fixed yesterday: Revision: 24519 Date: 17:45, 08 April 2010

First thing I did this morning was svn update and make clean all.  I'm
rebuilding Lazarus now. Let's see if Rev 24537 works w/o scrolling.