Merge branch 'admin-emoji-settings' into 'develop'

changelog.d/admin-emoji-packs.add

src/components/settings_modal/admin_tabs/emoji_tab.js

src/components/settings_modal/admin_tabs/emoji_tab.scss

src/components/settings_modal/admin_tabs/emoji_tab.vue

src/components/settings_modal/admin_tabs/frontends_tab.js

src/components/settings_modal/admin_tabs/frontends_tab.vue

...mponents/settings_modal/helpers/emoji_editing_popover.vue

src/components/settings_modal/helpers/modified_indicator.vue

src/components/settings_modal/helpers/setting.js

...components/settings_modal/settings_modal_admin_content.js

...omponents/settings_modal/settings_modal_admin_content.vue

src/i18n/en.json

src/services/api/api.service.js