UX idea: Pictures on published actions and processes

To make interface more user-friendly I propose to add ability to appy some images instead of action labels.

Currently you can use emojis instead of an action label. But this means you are limited by existing emojis and they also can look diferent on different browsers and devices.

Would be nice if we could choose an image from a URL-formatted line item for a particular action when we publish it on a page (kind of like we do with Image card publishing).

OR: The opposite - to be able to choose an action/process of an Image card.