Commit 436b829f (sw: save one vcl layout
call in SwFntObj::DrawText(), 2018-08-16) did this unconditionally,
which broke kashida justification. Re-introduce the same mechanism, but
this time opt out in the kashida case to keep that working.

This means that for Latin scripts we are back to 2 layout calls (instead
of 3) for each keypress in Writer.

Change-Id: I890f0ab04d1f5dce561f1536d7c8a6d67a639813
Reviewed-on: https://gerrit.libreoffice.org/69557Reviewed-by: Miklos Vajna <vmiklos@collabora.com>
Tested-by: Jenkins