Revert rev.68635 changes to Form.cs and PrintPreviewDialog.cs

Revert rev.68635 changes to Form.cs and PrintPreviewDialog.cs

* Form.cs: Revert previous change (remove call UpdateBounds
from form constructor), because it messes with the handle creation
order, and that one needs lots and lots of love.

* PrintPreviewDialog.cs: Revert change to CreateHandle (add check
for valid printer and throw InvalidPrinterException if document
is set but printer not valid), adding a MonoTODO. Once
handle creation is done properly, we can put this back in.

2006-11-29  Andreia Gaita  <avidigal@novell.com>

svn path=/trunk/mcs/; revision=68671