Update to MScore TAB font.

In preparation for future support of open string notation and under-dot fingering.
Merge pull request #847 from mgavioli/mscore_tab_font_update

Update to MScore TAB font.
fix #25436
fix #25447: Downward arpeggio does not render correctly in nightly build with emmentaler
some vtest fixes

wrong pitch of two notes in noteheadposition-1.mscz,
3 segnos too much in emmentaler-1.mscz,
wrong trills in emmentaler-8,
wrong position of two articulations in emmentaler-3.png
and two in bravura-5-ref.png

Also adding Windows batch file to generate the -ref.png files