[UPLOAD-1187][UPLOAD-1186][UPLOAD-1179] enforce patient limit

[krystophv]

for UPLOAD-1187, UPLOAD-1186 - add UI that shows patient limit modal when attempting to add a patient that would put the clinic over their limit. This "borrows" a lot of the blip code for these things verbatim, which technically includes some dead code paths, but I think the benefit from keeping the relevant files in sync outweighs the drawback of having some unused code. (I'm not dead set on this and could probably be convinced otherwise if there's a good argument for it)

adds the two line fix for UPLOAD-1179 as it came up as an issue for me when doing verification

[clintonium-119]

LGTM 💯
I agree that it makes sense to just drop the code straight in from blip where possible, even if some of it is unused.

Less effort now, and less effort down the road. win-win.

[clintonium-119]

All changes LGTM 🚢