Yang UI - History tab - It is possible to edit and run sent data with parameter that is not created in parameters tab

Repro steps:
1. Yang UI -> API tab
2. Expand network-topology rev.2013-10-21 -> expand config -> click network-topology to load network-topology form.
3. Select DELETE operation and click Send button.
4. Click arrow expander in front of network-topology button in the form.
5. Click topology list + button, insert "t0" into topology-id input field, select PUT operation and click Send button. Request has been sent succesfully.
6. Navigate to HISTORY tab, there is record of PUT method with Sent data.
7. Click sent data button, enter whatever string, e.g. "str9" to topology id path wrapper button and click Save parametrized data.
8. Expected behaviour: The parametrized data has not been saved since there is not parameter created with name "str9".
9. BUGGY BEHAVIOUR: The parametrized data has been saved with nonexistent parameter "str9".
10. Click arrow button to run parametrized request with the same data.
11. Expected behaviour: The parametrized request has not been run because of the nonexistent parameter that was used to edit the request.
12. BUGGY BEHAVIOUR: The parametrized request has been run successfully with nonexistent parameter in it.