Check if attribute changed during ApplyAttributes. If it did not change,
it is unnecessary to recalculate cell size, repaint etc.

Change-Id: Ic3a3fa24efa9ad3619b8979a67e972a7635311cc
Reviewed-on: https://gerrit.libreoffice.org/40198Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Tamás Bunth <btomi96@gmail.com>