- Display an exclamation mark (on a red background). In case of a multi-line message
- When a message with an error is selected, show a bottom bar with the 4 following actions: Retry - Delete - Edit - Copy
- If users press on Delete, a confirmation dialog is displayed
- When error messages occur, a general error message appears above the composer. Selecting Delete will delete all error messages. Pressing on Retry will attempt to resend error messages
- If users press on Delete, a confirmation dialog is displayed
- In room lists, decorate rooms with errored messages with the error icon. Rooms with errors should be sorted first
- Update the room display name and its avatar url when the Room Summary is updated on state events change (see `[session: updateRoomSummary: withStateEvents:]`).
- Store the riot display room name and its avatar url in the Room Summary.
- Add a new category `MXRoomSummary+Riot` to handle avatar display.
TODO: Increase file store version in `MXFileStore.h`.
