Allow not hiding empty staves if only one system can be included on the page
The "hide empty staves" feature is very handy to save space and to allow more music to be included on each page, if that is possible. However, sometimes hiding empty staves in two consecutive systems is not enough to allow inclusion of both systems on the same page. This happens particularly with orchestral scores when both systems include more than half of non-empty staves. Plain "hide empty staves" leaves, in those cases, a large blank space below the only system that can be included on the page. This looks untidy and unprofessional.
It would be nice to have an option to unhide empty staves when hiding them won't save pages anyway. This could be done either automatically from the score style settings, valid for all pages for which this condition holds, or manually on a per page basis.