fdo#81893: writerfilter: RTF import: \qc before \page was lost

The paragraph properties need to be applied to the paragraph following
the \page too, which did not happen in this case.

Also the minimized test doc shows that checkNeedPap() must be preceded
by checkFirstRun(), since there is no run preceding the \page.

(regression from 94765a1b3f543b3b60f8c1de05048d12f2576be4)

Change-Id: Id286c4fbdeee688fa4f6b24063b634bac637eab6
(cherry picked from commit 008d1187a9f3b36d6cbf31742632d237afecf1bd)
Reviewed-on: https://gerrit.libreoffice.org/10675
Reviewed-by: Miklos Vajna <vmiklos@collabora.co.uk>
Tested-by: Miklos Vajna <vmiklos@collabora.co.uk>