Number of results to show is not preserved when cloning a case

[MassimilianoUngheretti-TomTom]

Describe the bug
A clear and concise description of what the bug is.

To Reproduce

1. Create a case
2. Edit the "Number of Results to Show" property under "Tune Relevance" to e.g. 42 (default = 10).
3. Clone the case

Observed behavior
The new case has Number of Results to Show"=10 (default)

Expected behavior
The new case has the same "Number of Results to Show" as the cloned case.

[MassimilianoUngheretti-TomTom]

I see that in the cloning function there's a missing statement for the number_of_rows property.

[epugh]

We probably should be using some sort of .clone function that ActiveRecord supplies, this has bit us before.... WOuld you be interested in submitting a patch? Either a .clone or just explicitly copying that line!