Retrying & deleting failed messages

When a message failed to send

- [ ] Display an exclamation mark (on a red background). In case of a multi-line message, the tick is aligned with the last line:

- [ ] When a message with an error is selected, show a bottom sheet with:
- the message being actioned, to re-enforce context
- the 4 following actions: Retry - Delete - Edit - Copy


- If users press on Retry, send again the message and display a loading wheel
- 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