load jquery for the debug toolbar from static file

otherwise in case of offline work the absence of the google CDN
creates weird behaviors...


Former-commit-id: 8eb22c3555489cb861ca30b11a1d4ff971863149

ippisite/ippisite/settings.py

@@ -97,6 +97,9 @@ DATABASES = {
     }
 }
 
+DEBUG_TOOLBAR_CONFIG = {
+    'JQUERY_URL': '/static/jquery/jquery-3.3.1.min.js'
+}
 
 # Password validation
 # https://docs.djangoproject.com/en/1.10/ref/settings/#auth-password-validators