Merge branch 'halloween-accent-color' into 'develop'

Don't use accent color in Halloween mode

Closes #842

See merge request soapbox-pub/soapbox-fe!1060

app/soapbox/containers/soapbox.js

@@ -64,7 +64,7 @@ const mapStateToProps = (state) => {
 
   // In demo mode, force the default brand color
   const brandColor = settings.get('demo') ? '#0482d8' : soapboxConfig.get('brandColor');
-  const accentColor = settings.get('demo') ? null : soapboxConfig.get('accentColor');
+  const accentColor = (settings.get('demo') || settings.get('halloween')) ? null : soapboxConfig.get('accentColor');
 
   const singleUserMode = soapboxConfig.get('singleUserMode') && soapboxConfig.get('singleUserModeProfile');