add back mute prediction, add getter for relationships

src/components/block_card/block_card.js

src/components/follow_card/follow_card.js

src/components/mute_card/mute_card.js

src/components/notification/notification.js

src/components/status/status.js

src/components/user_card/user_card.js

src/components/user_settings/user_settings.js

src/modules/users.js

test/unit/specs/components/user_profile.spec.js