Request for information: dive list context menu

[Willem Ferguson]

I am running a number of tests on the latest master, going through all 
the dive list manipulations in the *dive list context menu*. There is 
one option in the dive list context menu (right-click on dive) that I 
have not seen before "Split selected dives".

What does this do?

I think I asked this question before and did not get a response.

Kind regards,

willem