View params do not support multiple values

HTTP allows multiple values for a request parameter so view params should do the same. should support a List or array as the target type of the value.

Maybe a new component should be introduced that behaves a bit like , but limiting the possible values may not be required in every case.
#### Affected Versions
[2.2]

Start by reviewing the Jakarta Faces view-parameter behavior described in this issue and how existing values are represented. Determine whether list or array targets, a new component, or both are required, then define tests that cover multiple HTTP parameter values and the expected completed behavior.

Written by the indexing model from the issue text.