- Combine all test init functions into `initConverse`
- Use `async` functions in more tests
- Replace `var` with `let` and `const` in more tests
- New utils method `toStanza` which converts a string to a Node
So that we first render dynamic content (e.g. images) before inserting
it into the chat.
Also, add the `show_images_inline` setting (which is the cause of this
whole change).
Updated tests to handle this new change and start using async/await
instead of promise callbacks.
- Render images as thumbnails
- Use the image.html template when rendering images from pasted URLs
- Update message and spoiler markup to render avatars
- Use the default avatar as fallback when user doesn't have one
- Instead of 'me' render own name or JID
