- Use flexbox where possible
- Simplify header by using `justify-content` instead of setting column widths
- Show description below the row containing the title and buttons
- Rename `chatRoomOpened` event to `chatRoomViewInitialized`
- Rename `chatBoxInitialized` to `chatBoxViewInitialized` and trigger only for `ChatBoxView` instances.
- New event `headlinesBoxViewInitialized`
- Trigger the `chatBoxInitialized` event when a new `_converse.ChatBox` is opened.
- Take locked_muc_domain into consideration in chatroom display name
- Use getDisplayName when rendering the heading name
- Give preference to bookmark name if it exists