[Lazarus] Patch to print selection in IDE.

[Michael Van Canneyt]

Hi,

I've uploaded small patch to the bug tracker (12197) to add support for
printing just the selection in the IDE instead of the whole file.
The IDE will ask if you want to print the whole file or the selection
if it detects a non-emty selection.

If it's OK, please apply.

The question dialog should probably be enhanced to ask if you want to
print line numbers or not, and select a font. If you want to get really
fancy, maybe highlighted printing should be added as well.

Michael.