and fix compatibility problems with 3.x scores prior to this PR
using the no longer existing `ornamentMordentInverted` by turning it
into the new `ornamentMordent`. and changing the old `ornamentMordent`
into `ornamentShortTrill` for pre-MuseScore 3.6 scores.
Fix the vtest and mtests too
Actually update to include some post-1.3 fixes too
Completely rewritten manpage, with improved documentation for most
aspects of the program, and documentation of the better batch con‐
version (see PR 4166). The new mscore.1.preview.sh shell script is
intended to be used for previewing changes, by developers.
CMake doesn't support single quotes, so the old value of MAN_PORTABLE was
causing errors. Insert manual line break to help groff displaying a long line.
Found via `codespell -i 3 -w --skip="./thirdparty,./share/locale,./fonts" -I ../musescore-whitelist.txt`
Whitelist:
```
clas
nd
ot
pres
strack
tage
te
```
- Set share path relative to executable on Linux too
- Linux dependencies for portable AppImage
- Helper scripts for desktop integration
- Update man pages
