The default TextHorizontalAlignment is block. Setting
paragraph alignment (on UI) works when this text
alignment property is set to block (otherwise has no effect).
In general this works on this way, but the existing
algorithm did not work in those cases when the
text was bigger than the container shape.

Change-Id: I02dba76f8e3033a465bb14dc826521966bb30987
Reviewed-on: https://gerrit.libreoffice.org/32123Reviewed-by: Tamás Zolnai <tamas.zolnai@collabora.com>
Tested-by: Tamás Zolnai <tamas.zolnai@collabora.com>