This task is about implementing an event that should log instances when people are prevented from switching from the Reply tool's `source` mode to the `visual` mode.
=== Background
T256150 implements a new dialog that will prevent people from switching from the Reply tool's `source` mode to its `visual` mode if the comment they've drafted contains a template //or// a table.
This task will help us understand how often people are encountering this dialog/interrupt and subsequently inform how we prioritize implementing the new multi-line comment syntax that will be decided up on in T246960.
=== Timing
We would like for this event to be named, implemented and tested by 4-August-2020.
=== Requirements
- An event is fired and logged when people encounter the dialog T256150 impelments
=== Open questions
- [ ] 1. What should this event be called?
- [ ] 2. What schema should this event be stored in?
=== Done
- [ ] "Open questions" are answered
- [ ] "Requirement" are implemented