[Feature request] Histogram chart stacked by category instead of creation date + easy pareto ?

Hello,

The histogram chart stacks data in order to show a kind of timeline. It doesn't help to see what are the most use tags of the day.The doughnut chart show this for the whole period of time selected. By the way, a dougnhut chart is not very helpful to see this in a glimpse of an eye:

- It's a cyclic chart so there is no starting and ending point, obfuscating any relational order. Data are not sorted (yet) anyway
- I have to look the color, then the legend, and make back-and-forth, to understand the chart, if I don't want to hover with the mouse (which can show only one label)

Having an histogram with tag label under each column would solve this imo.

Start by locating the histogram and doughnut chart entry points and reviewing how tags are grouped and ordered for the selected period. Confirm whether the requested view should replace or complement the existing charts, and clarify the optional Pareto behavior; done means the chart shows tag categories in a readable relational order with labels visible at a glance.

Written by the indexing model from the issue text.