Merge Request widget: No default avatar when gravatar is disabled
In the MR widget, there is no default avatar being rendered when the gravatar is disabled: ![Screen_Shot_2017-09-13_at_10.33.17](/uploads/e1415fcfcfba887887b7f1e32d9a0cca/Screen_Shot_2017-09-13_at_10.33.17.png) Vue component for user avatar already handles this situation.
issue