Tabs on headpiece misconfigured, going crazy

[callumlocke]

If this was an animated gif it would be flickering like crazy:

I suspect it's due to the fact that this JSON has switchTabEvery as null.

Two possible fixes (ideally we should do both):

• fix code in next-front-page so it defaults to 5000 if it's null (NB. the ES6 default arg here only applies if it's undefined, not if it's null) — @Aendrew
• fix the JSON so it is guaranteed always to have a sensible value for switchTabEvery — @Aendrew or @kavanagh

[kavanagh]

My bad. This happened because I added it to the spreadsheet.

I already have a fix to prevent this, I just need to merge it.

In the meantime I put values in the spreadsheet.

[kavanagh]

@Aendrew is fixing the home page. We're going to do it slightly differently to what you suggested @callumlocke: If the poll interval is undefined, null or less than 1 second then polling is disabled.

Hopefully (once we have an initial implementation done) we can also have a look at following the results page logic which also has a basic backoff implementation: polling increases after a failed attempt and then stops after 3 retries.