heatmap yaxis category axes can support sequence ?

[XiepengLi]

I change Annotated Heat Map with Plotly.js Charts demo to:
`
var xValues = ['A', 'B', 'C', 'D', 'E'];

var yValues = ['W', 'X', 'Y', 'Z','W', 'X', 'Y', 'Z'];

var zValues = [
[0.00, 0.00, 0.75, 0.75, 0.00],
[0.00, 0.00, 0.75, 0.75, 0.00],
[0.75, 0.75, 0.75, 0.75, 0.75],
[0.00, 0.00, 0.00, 0.75, 0.00],
[0.75, 0.75, 0.75, 0.75, 0.75],
[0.00, 0.00, 0.00, 0.75, 0.00],
[0.75, 0.75, 0.75, 0.75, 0.75],
[0.00, 0.00, 0.00, 0.75, 0.00],
[0.75, 0.75, 0.75, 0.75, 0.75]
];
`
but yaxis only show 'W', 'X', 'Y', 'Z' as 'W', 'X', 'Y', 'Z','W', 'X', 'Y', 'Z' is expected.

[XiepengLi]

As I add yaxis sequence to 100+ items, some item just hide to fit the height of canvas.

[alexcjohnson]

duplicate of #1516 - see in particular the ticktext/tickvals workaround posted there