Optional Participation intention content for teacher to choice, when they are creating the classroom

[VictorChenLi]

• [ ] Provide other participation intent options, like "answer", "eureka" or any words teacher want to use(should no more than 10 characters), and provide a set of preset icons for use.
• [ ] When creating classroom, show an optional section for teacher to choice and customize participation intention type

[VictorChenLi]

Several question need to consider:

1. Do we allow user create customized intent ticket? Customized intent ticket might cause confusing when the same icon represent different meanings in different classroom (need provide a way to show ticket meaning)
2. Should we provide preset intent ticket set for selection? how to maintain and scale it in the future? It might end up have lots of ticket set
3. If the meaning of the button will change from different classroom, we might need add a confirmation step before student send the tickets, preventing mistakes