Restyle in a zoomed 3D state sometimes changes the zoom level

When using Scatter3D, sometimes if the plot is restyled while it is in a zoomed state, the zoom level is spontaneously changed; sometimes a little, sometimes a lot.

To reproduce:

1. Visit this codepen: https://codepen.io/k_sze/pen/WXgNoJ
2. Zoom the plot a little bit using your mouse wheel; You can zoom in or out;
3. Open codepen's console and run the restyle() function;
4. Watch the plot's zoom level get changed spontaneously.

You may need to repeat steps 2 and 3 a few times.

Not sure if it's related to #346 and the fix in #351.

Riproduci il problema con il CodePen collegato usando Scatter3D: esegui lo zoom con la rotellina del mouse, quindi esegui restyle() dalla console. Traccia il percorso di restyle di Scatter3D e confronta il comportamento con le issue correlate #346 e #351. Il lavoro è completato quando il restyling non modifica più il livello di zoom esistente del grafico.