Feature request: add option to show graph with zero-based y-axis

[kriomant]

Currently graphs in reports are scaled so that minimum and maximum values are fit into screen. This makes it very hard to estimate relative amount difference.

Say, I look at report for last three months and I have spent $1000 during two of them and $1001 during last one. The graph will show two points at the bottom edge of the screen and one point at the top edge. So I think "What???" and start to search what all my money were spent for. This graph does not really show anything meaningful.
Please, add an option to always show zero point.

Additionally, when there are both positive and negative values in graph, zero axis is not even shown, which is really weird.

[GfE W3vHy (gfew3vhy)]

I agree about the problem but would prefer a solution that does not require diving into prefs.
Both layouts, auto ranged (current) and zero based (asked for), have their merits. From the auto ranged graph, it would be nice to take a quick look at the zero based graph to get the overall proportions right. Also, from the zero based graph, zooming in to the auto ranged view would be very helpful to analyze details.
Hence, the more accessible the switch or checkbox, the better.