v1.47.0

Added

• New volume gl3d trace type [#3488]
• Implement node grouping via box and lasso selections for sankey traces [#3712, #3750]
• Implement hovermode: 'x' for sankey traces,
  allowing users to compare links in a flow on hover [#3730]
• Add way for Plotly.toImage and Plotly.downloadImage to export images
  with current graph width/height by passing width/height option as null [#3746]
• Add legend attribute itemsizing with value 'constant' making legend item symbol sizing
  independent of the sizing of their corresponding trace item [#3732]
• Add hoverlabel.align with value 'left', 'right' and 'auto' to set the horizontal
  alignment of the text content within hover labels [#3753]
• Add contour.start, contour.end and contour.size attribute to surface traces [#3469]
• Add isosurface and volume to the gl3d bundle [#3488]

Changed

• Allow re-plot during drag interactions [#3716]
• Use high-precision in scattergl error bars shader [#3739]

Fixed

• Fix implementation of geo lonaxis and lataxis attribute tick0 [#3706]
• Fix scrollZoom: false configuration on mapbox subplots [#3745]
• Fix rendering of alpha channel in mesh3d traces [#3744]
• Fix hoverlabel.namelength: 0 case [#3734]
• Fix implementation of hoverlabel.namelength for pie, sankey, sunburst and
  the gl3d traces [#3734]
• Fix waterfall rendering when transforms filter out all
  increasing or decreasing bars [#3720]
• Fix clip-path attributes for pages with parenthesis in their <base> URL [#3725]