separate screen_name and screen_name_ui with decoded punycode

CHANGELOG.md

src/components/basic_user_card/basic_user_card.vue

src/components/chat/chat.js

src/components/chat_title/chat_title.js

src/components/emoji_input/suggestor.js

src/components/notification/notification.vue

src/components/status/status.js

src/components/status/status.vue

src/components/user_avatar/user_avatar.vue

src/components/user_card/user_card.vue

src/components/user_list_popover/user_list_popover.vue

src/components/user_reporting_modal/user_reporting_modal.vue

src/services/entity_normalizer/entity_normalizer.service.js

...pecs/services/entity_normalizer/entity_normalizer.spec.js