#406: Add legend attribute to all traces

- this enables setting legend anchors on trace generation
- additionally, fix `coloraxis` atribute name on some 3D traces

Author: kMutagene

src/Plotly.NET/Traces/Trace2D.fs

@@ -49,6 +49,7 @@ type TraceCarpetStyle() =
     /// </summary>
     /// <param name="Name">Sets the trace name. The trace name appear as the legend item and on hover.</param>
     /// <param name="Visible">Determines whether or not this trace is visible. If "legendonly", the trace is not drawn, but can appear as a legend item (provided that the legend itself is visible).</param>
+    /// <param name="Legend">Sets the reference to a legend to show this trace in. References to these legends are "legend", "legend2", "legend3", etc. Settings for these legends are set in the layout, under `layout.legend`, `layout.legend2`, etc.</param>
     /// <param name="ShowLegend">Determines whether or not an item corresponding to this trace is shown in the legend.</param>
     /// <param name="LegendRank">Sets the legend rank for this trace. Items and groups with smaller ranks are presented on top/left side while with `"reversed" `legend.traceorder` they are on bottom/right side. The default legendrank is 1000, so that you can use ranks less than 1000 to place certain items before all unranked items, and ranks greater than 1000 to go after all unranked items.</param>
     /// <param name="LegendGroup">Sets the legend group for this trace. Traces part of the same legend group hide/show at the same time when toggling legend items.</param>
@@ -81,6 +82,7 @@ type TraceCarpetStyle() =
             [<Optional; DefaultParameterValue(null)>] ?Name: string,
             [<Optional; DefaultParameterValue(null)>] ?Visible: StyleParam.Visible,
             [<Optional; DefaultParameterValue(null)>] ?ShowLegend: bool,
+            [<Optional; DefaultParameterValue(null)>] ?Legend: StyleParam.SubPlotId,
             [<Optional; DefaultParameterValue(null)>] ?LegendRank: int,
             [<Optional; DefaultParameterValue(null)>] ?LegendGroup: string,
             [<Optional; DefaultParameterValue(null)>] ?LegendGroupTitle: Title,
@@ -113,6 +115,7 @@ type TraceCarpetStyle() =
             Name |> DynObj.setValueOpt trace "name"
             Visible |> DynObj.setValueOptBy trace "visible" StyleParam.Visible.convert
             ShowLegend |> DynObj.setValueOpt trace "showlegend"
+            Legend |> DynObj.setValueOptBy trace "legend" StyleParam.SubPlotId.convert
             LegendRank |> DynObj.setValueOpt trace "legendrank"
             LegendGroup |> DynObj.setValueOpt trace "opacity"
             LegendGroupTitle |> DynObj.setValueOpt trace "legendgrouptitle"
@@ -145,6 +148,7 @@ type TraceCarpetStyle() =
     /// </summary>
     /// <param name="Name">Sets the trace name. The trace name appear as the legend item and on hover.</param>
     /// <param name="Visible">Determines whether or not this trace is visible. If "legendonly", the trace is not drawn, but can appear as a legend item (provided that the legend itself is visible).</param>
+    /// <param name="Legend">Sets the reference to a legend to show this trace in. References to these legends are "legend", "legend2", "legend3", etc. Settings for these legends are set in the layout, under `layout.legend`, `layout.legend2`, etc.</param>
     /// <param name="ShowLegend">Determines whether or not an item corresponding to this trace is shown in the legend.</param>
     /// <param name="LegendRank">Sets the legend rank for this trace. Items and groups with smaller ranks are presented on top/left side while with `"reversed" `legend.traceorder` they are on bottom/right side. The default legendrank is 1000, so that you can use ranks less than 1000 to place certain items before all unranked items, and ranks greater than 1000 to go after all unranked items.</param>
     /// <param name="LegendGroup">Sets the legend group for this trace. Traces part of the same legend group hide/show at the same time when toggling legend items.</param>
@@ -187,6 +191,7 @@ type TraceCarpetStyle() =
             [<Optional; DefaultParameterValue(null)>] ?Name: string,
             [<Optional; DefaultParameterValue(null)>] ?Visible: StyleParam.Visible,
             [<Optional; DefaultParameterValue(null)>] ?ShowLegend: bool,
+            [<Optional; DefaultParameterValue(null)>] ?Legend: StyleParam.SubPlotId,
             [<Optional; DefaultParameterValue(null)>] ?LegendRank: int,
             [<Optional; DefaultParameterValue(null)>] ?LegendGroup: string,
             [<Optional; DefaultParameterValue(null)>] ?LegendGroupTitle: Title,
@@ -229,6 +234,7 @@ type TraceCarpetStyle() =
             Name |> DynObj.setValueOpt trace "name"
             Visible |> DynObj.setValueOptBy trace "visible" StyleParam.Visible.convert
             ShowLegend |> DynObj.setValueOpt trace "showlegend"
+            Legend |> DynObj.setValueOptBy trace "legend" StyleParam.SubPlotId.convert
             LegendRank |> DynObj.setValueOpt trace "legendrank"
             LegendGroup |> DynObj.setValueOpt trace "legendgroup"
             LegendGroupTitle |> DynObj.setValueOpt trace "legendgrouptitle"
@@ -271,6 +277,7 @@ type TraceCarpetStyle() =
     /// </summary>
     /// <param name="Name">Sets the trace name. The trace name appear as the legend item and on hover.</param>
     /// <param name="Visible">Determines whether or not this trace is visible. If "legendonly", the trace is not drawn, but can appear as a legend item (provided that the legend itself is visible).</param>
+    /// <param name="Legend">Sets the reference to a legend to show this trace in. References to these legends are "legend", "legend2", "legend3", etc. Settings for these legends are set in the layout, under `layout.legend`, `layout.legend2`, etc.</param>
     /// <param name="ShowLegend">Determines whether or not an item corresponding to this trace is shown in the legend.</param>
     /// <param name="LegendRank">Sets the legend rank for this trace. Items and groups with smaller ranks are presented on top/left side while with `"reversed" `legend.traceorder` they are on bottom/right side. The default legendrank is 1000, so that you can use ranks less than 1000 to place certain items before all unranked items, and ranks greater than 1000 to go after all unranked items.</param>
     /// <param name="LegendGroup">Sets the legend group for this trace. Traces part of the same legend group hide/show at the same time when toggling legend items.</param>
@@ -317,6 +324,7 @@ type TraceCarpetStyle() =
             [<Optional; DefaultParameterValue(null)>] ?Name: string,
             [<Optional; DefaultParameterValue(null)>] ?Visible: StyleParam.Visible,
             [<Optional; DefaultParameterValue(null)>] ?ShowLegend: bool,
+            [<Optional; DefaultParameterValue(null)>] ?Legend: StyleParam.SubPlotId,
             [<Optional; DefaultParameterValue(null)>] ?LegendRank: int,
             [<Optional; DefaultParameterValue(null)>] ?LegendGroup: string,
             [<Optional; DefaultParameterValue(null)>] ?LegendGroupTitle: Title,
@@ -363,6 +371,7 @@ type TraceCarpetStyle() =
             Name |> DynObj.setValueOpt trace "name"
             Visible |> DynObj.setValueOptBy trace "visible" StyleParam.Visible.convert
             ShowLegend |> DynObj.setValueOpt trace "showlegend"
+            Legend |> DynObj.setValueOptBy trace "legend" StyleParam.SubPlotId.convert
             LegendRank |> DynObj.setValueOpt trace "legendrank"
             LegendGroup |> DynObj.setValueOpt trace "legendgroup"
             LegendGroupTitle |> DynObj.setValueOpt trace "legendgrouptitle"