Sparkline bar chart baseline goes 'up' when all values are zeroes.

Hello,

I’ve notice a strange behavior of sparklines within a datatable. Take this snippet (http://webix.com/snippet/da8558b2) as example.

Notice that, when all values are zero, the bar baseline goes “up”, differently from the others.

While in the subject, I would also like to ask if it’s possible to set a Maximum value to the sparkline, so the bars’ height will always be proportional to this maximum, like a normal bar chart.

I can confirm the issue.
Fix will be included in the next build
( When fix will be available, I will post an update here. )