Feature request: set priority for events

[ME-researchgroup]

Hi!

I think it would be helpful if we could pass priority as a kwarg to the @reactive.event decorator, much like it is currently implemented for reactive.Effect. This way, a user would be able to define a chain of reactions in a specific order to trigger on a single event.

Let's say an action button is clicked, a loading spinner is rendered, then some data are preprocessed, then some analyses are done, then a visualization is created and rendered, etc.