Refactoring: inline function hideOptionWithNoAuthorSelected()
Never hide the default option

I assumed that there would always be at least 1 other matching
the default category for any filter, but I have now found
counterexamples: when no filter is selected except the total
contributions filter, any value above 8 included results in
no matching Assessment Report value: there is no author with
8 contributions in a single assessment report.

Likewise, the Role filter matches no author with 10 contributions
or more: no author has more than 10 contributions in a single role.