Copy a default contrib

As a / an Studio user I want to Copy a default contrib so that I can easily create a copy of a default contrib without overriding it

AC
"Given I am listing contribs for a given menu in Designer UI tab
When I open a contrib by clicking on it
Then A copy button is available
Pressing the copy button creates a contrib with same values but a different name
Default contrib is not impacted by copy
A google analytics event is sent: ""Default contrib copy"" in Designer category
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