fix #31221
fix #39036
fix #36511
fix #39316: non-diatonic ornament playback
Merge pull request #1471 from MarcSabatella/39316-mordent

fix #39316: non-diatonic ornament playback
organize templates, small ui fixes
deal with old authentication key with musescore.com
remove numbers in template panel in new score wizard
fix #34531
fix #33896
better wording for naturals in key signatures option
fix #20783: add section breaks to joined scores

and line and page breaks too...