v1.4.12 Digitakt II support

Digitakt II support.

• Added Double selected action to add a copy of a sample to the end of itself for the selected samples.
• Prev / Next buttons on the edit panel to navigate between samples without needing to close the edit panel and re-select from the list.
• Cleaned up selected actions list, added overflow so list can scroll on mobile and flex to the width of the panel.
• Shift + Ctrl/Cmd click stretch longest/shortest selected action to set the stretch length in samples instead of seconds.
• Shift + Click on Trim Right button in editor, or selected actions, to also trim silence from the start (left) of the sample.
• Changed the behavior of the grid size buttons, clicking will now set the grid size and keep the selection, to also change the selection is now the shift+click action; This is inverted from other versions, but has been a requested change by several users.
• Shift + L will toggle the lists visibility, useful for simple chaining/conversion if loading a large number of files that can cause the browser dom rendering to slow.
• Hide 'Create .OT' button on sample panel if target SR is not 44100.
• Added common configuration for Digitakt II.

Archived live release: https://digichain.brianbar.net/1.4.12/