make-table fails if Italy is skipped

[Sjors]

If you remove Italy from data/regions.csv, the model run throws an error due to these special case lines:

covid19model/make-table.r

Lines 10 to 11 in 865806f

	dates_italy <- dates[[which(countries == "Italy")]]
	len_dates <- length(dates_italy)

That should be easy to prevent by checking if "Italy" is in countries.

There's also some special case code for the UK.

[s-mishra]

Hi @Sjors,

Thanks for pointing that out. We will amend that in the next release. Also the code for UK is just for handling a special case; it doesn't affect if UK is in there or not.