- `chatType` added to `Constants` to group chat type related values
- `messageContentType` added to `Constants` to group message content type related
values
- `MessageStore` maintained per message list now
- added new `ChatContentView` component used to display chat/channel content
- components updated to display messages from the new backend
- `StatusChatToolBar` appropriately updated
- mute/unmute feature added to chat/channel list as well as to `StatusChatToolBar`
This replaces the self-built components for the user list with StatusQ's
list item component and also addresses some of the quirks that existed in the UI
related to that original component.
The user list is now responsive and properly aligned.
**This depends on StatusQ v0.18.0**