message: Remove empty handbook pages from the side nav
diff: {{nav.section 'Development'}}
  {{nav.item 'Quickstart' 'docs.quickstart'}}
  - {{nav.item 'Dev environment' 'docs.dev-env'}}
  - {{nav.item 'Coding conventions' 'docs.conventions'}}
  - {{nav.item 'Testing' 'docs.testing'}}
  - {{nav.item 'Additional resources' 'docs.resources'}}
  {{nav.item 'Troubleshooting' 'docs.troubleshooting'}}
  {{nav.section 'Component gallery'}}
  