Log Message:
musescore: update to 3.6

pkgsrc-specific note: fixes from the 3.6 branch have been applied so
this builds with Qt 5.15 and doesn't crash when importing older scores
in certain contexts.

Release notes:

New

    Added the new default notation fonts "Leland"
    Added the new default text font "Edwin"
    Added a new dialog that suggests trying out the new engraving defaults
    Added automatic score ordering and bracketing
    Added automatic vertical justification of staves
    Added Mountain Dulcimer instrument and 3-string tab presets
    Added portamento for FLUID synthesiser
    Added Petaluma notation font
    Added mnemonics for "Save", "Save As" and "Resource \ 
Manager"

Improvements

    Redesigned the score migration dialog and the algorithm for applying new styles
    Improved the vertical staff justification algorithm
    First system indentation now takes the maximum of the length of the \ 
instruments labels and the style parameter
    Added a support of measure number interval at multi-measure rests
    Improved the recognition of instruments when loading a pre-3.6 score
    Altered default canvas background colour
    Improved functionality and appearance of 'Add Palettes' button
    Implemented a new "Export" dialog
    Improved the score symbols appearance
    Updated Bravura notation font to version 1.39
    Extended the set of accidentals
    Implemented a third stroke style for minim-based two-note tremolos
    Added extended fermata symbols to MusicXML I/O
    Updated SMuFL to the latest version 1.3
    Added support for triple sharp and triple flat
    Replaced the accidentals from Emmentaler with improved ones from Parnassus
    Added an indication of sounding pitch if the global concert pitch toggle is \ 
off and the current instrument has an actual pitch
    Added heavy, reverse end and heavy double barlines
    Added Sicilian translation
    The Edit Style dialog is no longer modal: the score can now be traversed \ 
while the dialog is open
    Added an alternative choice of “To Coda”
    Added a harmony duration interpretation
    MacOS window title bars now update according to the selected theme in MuseScore
    Added an automatic change of theme in MuseScore according to the MacOS \ 
dark/light mode setting
    The width of accidental symbols in the font is now honoured during drawing
    Solo instrument names now end in "solo"
    Improved collision avoidance between accidentals and ledger lines
    Improved the appearance of shadow notes
    Improved layout of the "Edit Style" dialog
    Cleaned up all unnecessary spaces and words used in file export
    Order of buttons in "Score migration" dialog is now platform-specific
    Improved search behavior in "Palettes"
    Added an option for applying new text font (Edwin) to imported MusicXML scores
    Replenished collection of demo scores

Fixes

    Fixed a bug preventing generation of square braces for an instrument with \ 
multiple staves
    Fixed an issue where style dialog loses setting of chord symbol radio buttons
    Fixed an issue with measure numbers not showing when first staff is cut away
    Fixed an issue where ledger lines only showed correctly when staff line \ 
spacing set to 0.5 increments (i.e 1.5, 2.0, etc.)
    Fixed an issue with image resize not correctly honouring aspect ratio
    Fixed an issue with "Select Similar Beat" command not working with \ 
shortened measures
    Fixed an issue where glissandos collide with double-digit start fretmarks
    Fixed glissando and portamento playback
    Enabled selection of text using the mouse in Palettes search field
    Adjusted the "Range-transpose" shortcuts
    Adjusted the appearance of dotted lines
    Staff visibility changes are now allowed mid-score
    Fixed an issue with the appearance of additive time signatures
    Fixed an issue where Mandolin unintentionally has a Grand Piano sound
    Expanded the list of special characters in "Special characters -> \ 
Common Symbols"
    Jump at Volta End no longer skips last measure
    Fixed a crash when switching instruments from an instrument with tabulature
    Fixed an issue when toggling between clefs of unpitched and pitched \ 
instruments, which led to a crash
    Fixed an issue where pressing Enter in the Score Properties dialog applies \ 
to the "New…" button rather than the "OK" button
    Fixed a crash when deleting header/footer text after hiding
    Fixed an issue where removing tuplets after inserting measures caused \ 
corruption/crash
    Reduced useless whitespace in JSON files
    Disabled auto collision avoidance for rests which do not have auto-placement \ 
enabled
    Fixed an issue where rests cannot be merged together when the measure has 3 \ 
or 4 voices
    Fixed an issue with the "Flatten all Beams" setting being ignored \ 
on score reload
    Fixed an issue where voice-1 rests collide with voice-3 rhythm slashes
    Fixed an issue where C time signature does not update
    Fixed an issue with readability of the tempo field by screen readers
    Fixed a palette search shortcut functionality issue
    Fixed an issue with missing space between the key signature and the first \ 
note when the time signature is hidden
    Fixed a freeze when a tie has the same start and end note
    Fixed a crash when deleting or changing a time signature in a multi-measure rest
    Fixed an issue with import of MusicXML files from the new version of Finale
    Fixed an incorrect tuplet calculation on a two-note tremolo
    Removed support for the "place at middle of stem" option for \ 
single-note tremolos
    Fixed an issue where duplication of voltas leads to following voltas being \ 
ignored
    Fixed an issue with MusicXML import of changed transpositions
    Fixed an issue where hairpin export stops halfway
    Fixed an issue with FirstSystemIndentation style setting not taking account \ 
of instrument label length
    Fixed an issue where MusicXML import did not honour \ 
"measure-style/slash"
    Fix missing kerning in MuseJazz Text
    Fixed an issue with application of new styles to 'recent' scores
    Fixed an issue with application of new styles to pre-3.6 scores
    Fixed an issue with incorrect brace scaling
    Fixed an issue with import of MusicXML tempo changes
    Fixed an issue where aligned pedal lines jump wildly while being dragged
    Fixed an issue with updating of translations
    Fixed an issue with export of fretboard diagrams to MusicXML
    Fixed an issue where atonal key signatures caused spacing issues
    Fixed an issue with the "Show MIDI controls in mixer" checkbox in \ 
"Preferences" dialog
    Fixed an issue with inconsistent stem directions on middle-line beamed notes
    Fixed an issue with application of new styles to 'recent' scores
    Fixed an issue with measure numbers colliding with brackets
    Fixed an issue with triggering of translation process after a language switch
    Fixed an issue where fingering was wrongly scaled with note size
    Fixed an issue with cutaway courtesy clefs not showing
    Fixed an issue with export of 32nd-note tuplets into MusicXML format
    Removed unnecessary rounding of BPM value in "Play panel"
    Fixed an issue with unexpected behavior of "Esc" key in "Edit \ 
Style" dialog
    Fixed a crash when importing a file with an incomplete tuplet
    Fixed an issue where adding instruments on top of others whose parts have \ 
been created leads to score corruption
    Fixed an issue with styles in the "converter" mode
    Fixed an issue where changing any property on a text line resets all styled \ 
properties to default
    Fixed an issue where the "Custom" string in "Instrument > \ 
Order" shows untranslated