Support for the fade articulation in fonts, and import in GP4 and GP5 formats
Merge pull request #988 from jpirie/23058-fade

Fade-in articulation in GP4 and GP5 formats
New mscore.ttf font file generated using an older version of FontForge
Merge pull request #1032 from jpirie/new-ttf

New mscore.ttf font file generated using an older version of FontForge
fixes for slur editing
Added cloneRange function that creates a modifiable copy of range.
Added spannerMapCopy function that creates a modifiable copy of the score spanner map.
Added SelectionWindow class.
Added selection filter class.
Added selection filter object to score.
Added communication between selection window and selection filter.
Added example filtering for dynamics.
Added updating of selection window when switching scores in musescore.
Added filterRange method for copied segment list.
Method only works for dynamics.
Added const modifiers.
Added function that sets selection filters.
Added test suite for selection filter.
Added compare and save mime data function in testutils.
Added test for dynamic filtering.
Added filtering of articulations.
Added test for articulation filter.
Created a general function for filter type testing.
Moved selection window labels to an array.
Added shortcut for selection window - F6.
Added filtering of lyrics.
Added appendFiltered function.
Fixed articulation highlight when tied with rests.
Added filtering of fingering.
Added filter for chord symbol