Add namespaced events for Thesis interactions

[yulolimum]

It would be useful to know when thesis enables/disables the editor, etc. I ran into an issue where I need to disable a slider when thesis editor turns on.

For reference: https://stackoverflow.com/questions/21817397/event-handler-namespace-in-vanilla-javascript?utm_medium=organic&utm_source=google_rich_qa&utm_campaign=google_rich_qa