Merge branch 'customizable-post-actions' into 'develop'

changelog.d/customizable-actions.add

src/App.scss

src/components/account_actions/account_actions.vue

src/components/chat_message/chat_message.vue

src/components/confirm_modal/mute_confirm.js

src/components/confirm_modal/mute_confirm.vue

src/components/conversation/conversation.js

src/components/conversation/conversation.vue

src/components/extra_buttons/extra_buttons.js

src/components/extra_buttons/extra_buttons.vue

src/components/favorite_button/favorite_button.js

src/components/favorite_button/favorite_button.vue

src/components/input.style.js

src/components/moderation_tools/moderation_tools.vue

src/components/notifications/notification_filters.vue

src/components/popover/popover.js

src/components/popover/popover.scss

src/components/popover/popover.vue

src/components/post_status_form/post_status_form.vue

...components/quick_filter_settings/quick_filter_settings.js