v1.23.0

Added

• Add scrollbox to long dropdown updatemenus [#1214]

Fixed

• Multiple IE9 fixes [#1332]
• Ensure that plotly_afterplot is fired before Plotly.plot promise is
  resolved [#1342]
• Fix exception when dragging graphs with empty text labels [#1336]
• Fix exception when creating empty ohlc and candlestick traces [#1348]
• Fix editable: true legend items logic for ohlc and candlestick traces [#1349]
• Fix restyle for contour traces in cases where autocontour is defaulted to true
  [#1338]
• Fix edge case in axis label tick assignments [#1324]
• Fix vanishing titles text in editable: true [#1351]
• Fix 3D thumbnail image generation [#1327]