Retrying & deleting failed messages

[giomfo]

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 bar with 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
  

[JonasKress]

@giomfo can this be closed?

[giomfo]

Tested on v1.3.5: ok