Even if a prediction is hidden from the report once is flagged,
it can be flagged several times if the user visits detailed view via URL.
We remove the checkbox to select a prediction and flag it
once it has already been flagged.
All the setup/teardown/pre/post/conditions template methods
now are required to return void. This was warned with phpunit 7
and now is enforced.
At the same time, fix a few wrong function names,
provider data and param types, return statements...
Amaia Anabitarte