move xmlstream and qzip into thirdparty
fix #25650
use char for some enums
move qzip and xmlstream into separate libs
fix mtest
fix #25646
fix #25666: link xmlstream under Windows
Merge pull request #892 from Jojo-Schmitz/25666-link-under-windows

fix #25666: link xmlstream under Windows
fix #25666: fix warning reg. ignored dllimport
Merge pull request #893 from Jojo-Schmitz/25666-link-under-windows

fix #25666: fix warnings reg. ignored dllimport
partial fix for #25390: layout of 1.3 scores
fix #25648: manual positioning of note/chord should affect accidental
improve handling of rests
more tweaks; back out accidental change for now
update tests
improve handling of unisons and import of mirror property
fix notes_useroffset test; consider replacing it