If the default style and default pool items are no longer in sync,
our script detection assumes that any style without an explicitly
set font has script type CTL or CJK.

Use the same selection idea for both cases and at the same time
use the *_SPREADSHEET font items for the default pool items.

Change-Id: I6a5bb14a3fabab11627ad52b9e79554fdcedac89
Reviewed-on: https://gerrit.libreoffice.org/57470
Tested-by: Jenkins
Reviewed-by: Markus Mohrhard <markus.mohrhard@googlemail.com>