migrate to v-slot

src/components/account_actions/account_actions.vue

src/components/chat_list/chat_list.vue

src/components/chat_message/chat_message.vue

src/components/domain_mute_card/domain_mute_card.vue

src/components/extra_buttons/extra_buttons.vue

src/components/moderation_tools/moderation_tools.vue

src/components/notifications/notification_filters.vue

src/components/popover/popover.js

src/components/react_button/react_button.vue

src/components/selectable_list/selectable_list.vue

src/components/settings_modal/helpers/modified_indicator.vue

src/components/settings_modal/settings_modal.vue

src/components/settings_modal/tabs/mutes_and_blocks_tab.vue

src/components/status_popover/status_popover.vue

src/components/timeline/timeline_quick_settings.vue

src/components/timeline_menu/timeline_menu.vue

src/components/user_card/user_card.vue

src/components/user_list_popover/user_list_popover.vue

src/components/user_profile/user_profile.vue

src/components/user_reporting_modal/user_reporting_modal.vue