CHange: WHEN PMTCT service line is selected do not change start regimen
 date in editing patient's details.
- Isonazid prophylaxis should have start date and end date

- WHEN PMTCT service line is selected do not change start regimen date in
adding and editing patient's details.

- Add Category to TB section so that when patient is selected if they have
TB (if category 1 then intensive is 3 months range,continuation is 112 days
 range),category 2 is intensive is 3 months range and
continuation 5 months)