Sabaki v0.12.0

Added

• Add edit button to comments section
• Allow a subset of Markdown in the comments section

Changed

• Now board markup scales with board size
• Update to Electron v0.37.6

Fixed

• Fix engines menu list not updating when adding/removing engines
• Fix comments textbox scrolling to top when editing
• Fix navigation shortcuts not working after closing drawers
• Fix conflicting auto-links in the comments section
• Slider doesn't stop halfway anymore when sliding over the end