Built-in Web Service as Action feature - show all header lines

[Walter.Koller]

based on ticket #251602

BP allows the definition of external web services that then can be used as Action stages. 
There is an option in the definition 'Disable Sending of Request' which is a nice feature to first do same dry runs before actually sending the WS request.
However, the output of this Action changes depending if the 'Disable Sending of Request' is activated or not: some header lines of the request are omitted in the Request Output data.
In our tests these header lines were missing when 'Disable Sending of Request' was active:
'Host', 'Content-Length', 'Connection'

Since this is intentionally 'by design' I am creating this enhancement idea to have all header lines shown in the request output, regardless if 'Disable Sending of Request' is active or not.