"Autoscale view" button in widget doesn't respect inverted axis

Example
```python
%matplotlib widget
import plopp as pp
import scipp as sc

p = pp.plot(sc.DataArray(sc.array(dims='x', values=[3, 2, 1])))
p.ax.invert_yaxis()
p
```
To reproduce: Click "Autoscale view" button (home icon), the yaxis is no longer inverted.
The expected behavior is that the yaxis should remain inverted.

