- Fix the ListView not auto-scrolling like it should when message
delegates changed height, such as when images were loaded
- Fix messed up delegate positions overlapping each others when
movements happen
- Fix previous/nextItem binding broken due to imperative modification
- Fix "messageBodyWidth" binding loop
Use proper layouts and get rid of multiple annoyances/bugs like
text-wrapping randomly happening in the middle of words, background
rectangles being too large, a certain binding loop, etc
