116: Finale files - multirests don't work properly

Due to a minor bug in the Finale file converter, multirests don't currently work properly in parts extracted from converted Finale files. This results in every bar rest being marked with the Split multirest option. Currently the only work-around is to manually remove this option at each barline.

Note that this problem is fixed in Sibelius 2 (and later). If you don't yet have the latest version of Sibelius, get an upgrade.