Worked around weird issue causing notice errors.

It seems that when one or more parameter definitions doesn't have a default
value. That this causes some unexpected behaviour from DataValues/Validator
where parameter definitions doesn't get populated correctly (highly speculative)

Setting a default value on activeicon parameter magically removes all errors.

This changeset was created due to discussion on this changeset:
https://gerrit.wikimedia.org/r/82219

Bug: 54615
Change-Id: I3d91dc5cd84a5e2586859079b0076b8299c40e2c