Improved csp_whitelist

Author: ihorvansach

etc/csp_whitelist.xml

@@ -32,6 +32,7 @@
                 <value id="mg-googleanalytics" type="host">*.google-analytics.com</value>
                 <value id="mg-google-com" type="host">*.google.com</value>
                 <value id="mg-doubleclick-net" type="host">*.doubleclick.net</value>
+                <value id="mg-googlesyndication-com" type="host">*.googlesyndication.com</value>
             </values>
         </policy>
         <policy id="img-src">