message: Add .1s option to D3 Format dropdown
diff: @@ -12,6 +12,7 @@ const D3_FORMAT_DOCS = 'D3 format syntax: https://github.com/d3/d3-format';
  // input choices & options
  const D3_FORMAT_OPTIONS = [
  + ['.1s', '.1s | 12k'],
  ['.3s', '.3s | 12.3k'],
  ['.3%', '.3% | 1234543.210%'],
  ['.4r', '.4r | 12350'],
  