Virus visit column changes

I deployed the changes in prc-test but browsing https://prc-test.parkinson.lu/subjects raises an ajax error (414 uri too large). I don't get this error locally. I tried to increase the buffers in nginx but nothing makes it work.

This is not as a result of these changes. I tried to deploy a previous commit and got the same error.

@valentin.groues can you check prc-test machine and try to fix it? @piotr.gawron is this a known issue?

Changes:

• Change Visit 1 virus to Visit 0 RT-PCR
• Change Visit X virus to count from 0
• Filter for inconclusive
• Change rest of Visit number references in the table