message: Fix shift-enter repeating last character
diff: @@ -140,6 +140,13 @@ const messageComposerBindings = (): KeyBinding<MessageComposerAction>[] => {
  key: Key.ENTER,
  },
  });
  + bindings.push({
  + action: MessageComposerAction.NewLine,
  + keyCombo: {
  + key: Key.ENTER,
  + shiftKey: true,
  + },
  + });
  } else {
  bindings.push({
  action: MessageComposerAction.Send,
  