fdo#68546 Update style settings before changing layout

Currently, ImplInitStyleSettings()'s effect isn't be reflect to UI.
Because it is called after refreshing UI by ImplLayoutChanged().
This fixes these order.

Change-Id: I4cfe0115bc32551cecc70cf4b33921fb8ee7ea5a
Reviewed-on: https://gerrit.libreoffice.org/8714
Reviewed-by: Caolán McNamara <caolanm@redhat.com>
Tested-by: Caolán McNamara <caolanm@redhat.com>