Shapes are misplaced when using numbers as categoryarray values

If X axis type is category, and categoryarray contains (string type) numbers, then shapes are horizontally misplaced, as x0 and x1 values in the shape are not considered as items, but as indices of the categoryarray.

Eg.

This one works perfectly:

<div id="tester"></div>
<script>
    var layout = {
      "xaxis": {
        "type": "category",
        "categoryarray": [
          "red", "green", "blue", "purple", "cyan", "yellow", "magenta"
        ],
      },
      "shapes": [
        {
          "type": "rect",
          "xref": "x",
          "yref": "y",
          "x0": "purple",
          "x1": "yellow",
          "y0": 10,
          "y1": 20,
          "fillcolor": "rgba(45,180,135,0.3)",
        }
      ]
    };

    var data = [
      {
        "x": [ "red", "blue", "cyan", "magenta" ],
        "y": [ 10, 20, 30, 40],
      },
    ];
    
    TESTER = document.getElementById('tester');
    Plotly.newPlot( TESTER, data, layout );
</script>

But if I replace the color names to numbers:

  // in "categoryarray":
      "10", "20", "30", "40", "50", "60", "70"
...
  // in "shapes" this won't work:
      "x0": "40",
      "x1": "60",
...
 // in data:
    "x": [ "10", "30", "50", "70" ],

It will work only if I replace the category values to their indices in the shapes:

      "x0": 3,
      "x1": 5,

Note: if this is not intended to be a bug, but an undocumented feature, please document it, so I can rely on it later. 😃

Commencez par la reproduction JavaScript inline dans l’issue et comparez le comportement de l’axe des catégories et des shapes pour les labels de couleur avec celui des labels de chaînes numériques. Reproduisez les shapes mal positionnées, puis vérifiez que les coordonnées des shapes utilisant des valeurs de catégorie numériques s’alignent sur les catégories correspondantes plutôt que sur leurs seuls indices.