Call drawing also after the new selection is set, similar to
other cases where DrawSelectionXOR() is called before and after
selection change.
In desktop LO drawing is always called again and again by timeout,
so there the selection is updated anyway, while in LO online painting
does not emit a notification.

Change-Id: I6e9337fc0cfb61656387ba44d901521c3dfa60dd
Reviewed-on: https://gerrit.libreoffice.org/50268Reviewed-by: Tamás Zolnai <tamas.zolnai@collabora.com>
Tested-by: Tamás Zolnai <tamas.zolnai@collabora.com>