Fix label clicking

[moromis]

Right now, if zoomed fully in, the top couple labels do not register via singleClicking, in this screenshot:

The first label you can click on the y-axis is DEF vs GHI

[tschaka1904]

Is this related to the wrong clicking behaviour? I noticed this behaviour:

When I double-clicking on a label on the y-axis, it does do some sort of re-ordering. But the little grey indicator triangle becomes red two rows underneath.

[moromis]

@tschaka1904 Yeah, it is related. I think in general the conversion of mouse coordinates to webgl coordinates and also how it transforms with regards to the aspect ratio is wrong. I think it belies a larger underlying issue, as I think it's caused by inserting the legend component, the canvas width changing, and then never updating viz_dim.

[tschaka1904]

I can confirm the issue about the legend. Not showing it resolves this issue.