IDEA GATHERING: Test ideas with demographic data work well with all combinations of data

[BeccaMelhuish]

@ssin1901 As we put the issue relating to demographic data through to test with a focus on testing with 3 data fields (for the user testing), I'm making an issue to test all combinations of data fields. To make sure all works OK for all possible options other use cases may use, before we actually make the code live.

Would be good to test these combinations both for posting an idea, but also for saving a draft idea and then coming back to edit them (i.e. to see if the same number of dem data fields appear).

Will put this issue straight to QA pre-live, but it should be tested only once draft anonymous ideas is fully complete :)