Mscore font: updated hints for moved glyphs

Several of the glyphs recently moved for SMuFL compatibility kept hints for previous position. Updated.
Merge pull request #563 from mgavioli/mscore_font_updated_hints

Mscore font: updated hints for moved glyphs
use smaller broken beam in grace notes
fixes for emmentaler-8 vtest
fix #21458: Bar rests not presented correctly at line break before key and time signature change
fix #18453: C major Key Signature get lost in nightlies if exported from concert pitch in 1.3
fix #22607: Incorrect clef imported from 1.3