The sidebarRight option wasn't being read

src/boot/after_store.js

@@ -110,6 +110,7 @@ const setSettings = async ({ apiConfig, staticConfig, store }) => {
   copyInstanceOption('alwaysShowSubjectInput')
   copyInstanceOption('showFeaturesPanel')
   copyInstanceOption('hideSitename')
+  copyInstanceOption('sidebarRight')
 
   return store.dispatch('setTheme', config['theme'])
 }