musescore/MuseScore — pull request #1120 by MarcSabatella (2014-08-12 02:25:22+00:00)
Title: fix #29436: chord symbols don't change size with staff

Kind of seems like like there should be a more direct way to do this - like calling staff->spatiumChanged and having it use some version of scanElements to apply the change to elements on the staff. But staff->spatiumChanged does not do this.