Categories as icons

[adilyalcin]

Support displaying categories as icons.

to

The bar chart (and measure label) will appear below the icon

Icons can be shown in a grid layout with flex-box, so it can overflow into multiple rows.

• If icons are well used, it improves appeal of the interface, and still be minimal.
• However, appropriate use of icons is not an easy task! https://infoactive.co/data-design/ch17.html, only the right sample is easy to understand.