With this, the print preview window no longer performs direct paint.

(cherry picked from commit 46e7991b)

Conflicts:
	sw/inc/pagepreviewlayout.hxx

Change-Id: I53f05d8a3b723bc131f21a485e0ffec71484670a
Reviewed-on: https://gerrit.libreoffice.org/17394Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Tomaž Vajngerl <quikee@gmail.com>