Fix group combo in staff type editor.

the group combo box accesses the wrong staff templates, as it uses the combo current item index rather than its data.

Also cleaned a potential infinite loop.
fix upload path of travis artifact
Merge pull request #920 from mgavioli/Fix_group_combo_in_staff_type_editor

Fix group combo in staff type editor.
another try for a working vtest upload
another try for a working vtest upload
remove debugging for artifact uploading
update freefonts to vanilla 20120503, remove freefonts from mtest.qrc because they cause a g++ crash(!)
Merge pull request #922 from lasconic/freefontupdate

update free fonts to vanilla 20120503
fix missing build dependency
fix genManual dependency
fix #17535
fix #25815
fix #25422 next try
fix dot visibility export
fix measure number visibility when top staff is hidden
fix #25478: deleting an instrument causes rehearsal marks to vanish, also fix volta for the same bug
convert enum ArticulationAnchor to enum class
convert enum ChordLineType to enum class
convert unnamed enum to enum class CrossMeasure
convert enum DurationType to enum class