Lataa Hydrogen (Advanced drum machine for GNU/Linux) 1.2.3

Added
- Forward compatibility for .h2song and drumkit changes introduced in version 1.3.0
Fixed
- Restore mute button state of master mixer strip on song load.
- Recorded MIDI notes were inserted ahead of the beat (#1851).
- Drumkit Property Dialog:
- Images were written regardless whether one hits the ok or cancel button.
- When using Save As to create a new drumkit, the added image was put in the
- Allow to Save As drumkits derived from kits not found on the current system.
- Audio Engine: In Song Mode with Loop Mode deactivated Hydrogen missed notes
- Fix crash on playing back notes with custom length (#1852).
- macOS: fix naming of CoreMIDI header (#1865).
- Fix various rendering issues with custom length notes.
- Fix potential crash/failing startup on Windows in case PortAudio or PortMidi
- Fix crash on shutdown, song export, or driver changes in the Preferences while
- Pattern Editor:
- Only delete stop notes clicked by the user. (#1859)
- Proper undo of moving notes out of DrumPatternEditor. (#1859)
- Custom note lengths are now only drawn till the next stop
- Highlight selected stop notes too. (#1859)
- Update selected notes visually on left and right keyboard movement. (#1859)
- Fixed stop note color which was no different than the default note color
- Fixed grid line rendering on rational pattern size nominator.
- Fixed grid line colors on very fine resolution.
- Fix broken file browser dialogs on Linux when using translations (#1908).
- Fix drumkit export on Windows (#1927).
- Timing drift (and artifacts) in playback track rendering on some hosts is