reduce maximum_backups default from 7 to 5

config/site_settings.yml

@@ -871,7 +871,7 @@ backups:
     default: false
   maximum_backups:
     client: true
-    default: 7
+    default: 5
     shadowed_by_global: true
   automatic_backups_enabled:
     default: true

test/javascripts/helpers/site-settings.js

@@ -80,7 +80,7 @@ Discourse.SiteSettingsOriginal = {
   "tos_accept_required":false,
   "faq_url":"",
   "allow_restore":false,
-  "maximum_backups":7,
+  "maximum_backups":5,
   "version_checks":true,
   "suppress_uncategorized_badge":true,
   "min_search_term_length":3,