Allow creating an event template

[CyGa]

Hi,

Some of my events have a common events arguments and/or reply payload.
Creating a template would speed up their creation.

Also, when using round trips from TestStand, I made a modification to the content of a round trip event to easily handle termination.
It could be nice if this modification could be saved as a template, so that every round trips I create to be used within a TS sequence would contain automatically that modification.

[Olivier-JOURDAN]

Cool idea but we need to investigate how much time this requires to implement. We will postpone this idea for a later DQMH version.