Merge pull request #3658 from consul/fix_web_section_seeds

Make WebSection seeds idempotent

db/seeds.rb

@@ -9,11 +9,11 @@ end
 
 Setting.reset_defaults
 
-WebSection.create(name: "homepage")
-WebSection.create(name: "debates")
-WebSection.create(name: "proposals")
-WebSection.create(name: "budgets")
-WebSection.create(name: "help_page")
+WebSection.where(name: "homepage").first_or_create
+WebSection.where(name: "debates").first_or_create
+WebSection.where(name: "proposals").first_or_create
+WebSection.where(name: "budgets").first_or_create
+WebSection.where(name: "help_page").first_or_create
 
 # Default custom pages
 load Rails.root.join("db", "pages.rb")