Request: Exclude a category from expenses bar chart

[rolling-robot]

On monthly expenses page there is a histogram with expenses per category, which looks like that.

This widget allows to focus on a particular expense category, like "food" or "gifts" by clicking on its color in the legend on top.

On some occasions, like you see on the screenshot, I have large expenses in one of the categories. That makes all of the other categories drop somewhere around zero.

The case is that I can focus the histogram on a particular category. But what I would really like is to exclude one particular category, to compare all the other categories (e.g. everything except "gifts" and "other").

What do you think about adding such feature? Can that be useful to someone except me?

[rolling-robot]

Update: the same can be achieved when several categories selected. Right now only one can be in focus.