Text missing if axis range is reversed and cliponaxis=false

[darabos]

I have a pull request (darabos#1) for it, but I made it against my own repo now to follow the contribution guidelines.

I committed the "before" baseline to demonstrate the issue. You can see the fix in the second commit's diff:

This example is a bit unusual. Who uses upside-down bar charts?! In real life I hit this issue with a horizontal bar chart where I wanted the order of the groups in the chart to match the order in the legend:

I set autorange: 'reverse' and the texts disappeared:

If I remove cliponaxis: false, the texts are clipped:

I'm open to suggestions, but my PR is aimed at fixing the version with the missing texts. Thanks!

[etpinard]

Thanks very much for bringing this up!

Looks fix is looking great. I made one minor comment -> https://github.com/darabos/plotly.js/pull/1/files#r179756565

PR away 🚀