v1.8.0

Complete UI Refactor - rebuilt with Jetpack Compose

• Custom Channel & Line colors.
• Overhauled icons to more simplistic & effective designs.
• Percussion input now uses a switch widget instead of a button.
• Relative input mode now accessed by tap-and-holding notes instead of a dedicated widget.
• Moved play button further away from undo button.
• Added dots to indicate previously pressed notes and underlines to indicate preceding note values.
• Dashed border used to indicate primary selection