You can filter the requests that send cookies with adding this implementation to the "OnBeforeRequest" method in the FiddlerScript editor.
oSession["ui-customcolumn"] = oSession.oRequest["Cookie"];
Do you want to have your say when we set our development plans?
Do you want to know when a feature you care about is added or when a bug fixed?
Telerik Feedback Portal
and vote to affect the priority of the items