Synfire 2.4.1

This update fixes several issues and also includes minor enhancements based on your feedback. The file format had to change, so earlier versions of Synfire can't open the files you will save with this update. Make a backup of your projects just in case.

Feature Enhancements: 
- New file format (not backwards compatible)
- Sparks: Include extended catalog
- Ability to drag/drop export Harmony, Preview, Take from parameter outlets
- Variation: Apply new variation to selected span if there is one
- Pause: Apply state change to selected span if there is one

Resolved Bugs: 
- Sparks: Menu item for opening current sketch as arrangement was missing
- Sparks: Fixed disabled items in File menu
- Device Editor: Some edits did not mark devices as dirty
- Device Editor: Improved selection behavior with sounds and categories
- Preview happens to add an instrument to the arrangement where it shouldn't
- Filenames with umlauts not handled correctly on Apple Silicon
- Audio/MIDI Setup: Reloading devices and presets did not properly refresh UI
- Dropped snippet must not create new instrument if the instrument is global
- Fixed several bugs as per submitted crash reports

Other Changes: 
- Overview: Arrow keys should move a container
- Palette: Play button should preview progression if structure is empty
- Inspector should switch back to local parameter when Harmony is selected