ScheduledStatuses: refactor ScheduleForm, display "Schedule" button in Composer, fixes #660

app/soapbox/features/compose/containers/compose_form_container.js

@@ -26,7 +26,7 @@ const mapStateToProps = state => ({
   anyMedia: state.getIn(['compose', 'media_attachments']).size > 0,
   isModalOpen: state.get('modal').modalType === 'COMPOSE',
   maxTootChars: state.getIn(['instance', 'max_toot_chars']),
-  schedule: state.getIn(['instance', 'schedule']),
+  scheduledAt: state.getIn(['compose', 'schedule']),
   scheduledStatusCount: state.get('scheduled_statuses').size,
 });