musescore/MuseScore — pull request #906 by mgavioli (2014-05-14 09:11:43+00:00)
Title: Staff type editor: Fix parameters common to several groups

Staff type editor: Fix disambiguation of parameters common to several groups.

- GenKeySig and ShowLedgerLines are shared by standard and percussion group
- SlashStyle is shared by all three groups

When saving the style, the current implementation overwrites the shared parameters with percussion params.