Should clear cache after Gravatar/Twitter options are changed
As noted in: https://gitlab.com/gitlab-org/gitlab-ce/issues/1808#note_1902207
After disabling the Gravatar or Twitter options, posts that existed before the option was changed still have Gravatars and/or Twitter buttons visible until the admin runs gitlab-rake cache:clear
.
Either the cache should be cleared automatically when the relevant options are updated, or a notification/banner should be displayed to the admin to remind him that he needs to run gitlab-rake
.