Full zoom out

[lpatiny]

In this example: https://github.com/NPellet/jsGraph/blob/master/examples/v2/other/manyannotations.js

We force Ymin (-5) and Ymax (105) values but when we zoom in and click twice to zoom out the Y scale does not go to the forced values but to the values that fit all the points.

I would expect that if the scale is forced it goes back to the forced values.

[NPellet]

Can you try out using commit 11f6088 ?

[NPellet]

@lpatiny bump