[x] Back arrow or device back button takes user to the previous page they were viewing.
If coming from the family profile page, the label should be "Return to family members";
if coming from a register, the label should be "Return to all ANC women" for ANC;
"Return to all PNC women" for PNC;
"Return to all children" for children under 5;
"Return to all FP women" for FP;
"Return to all malaria patients" for Malaria;
if coming from the All Clients register list, the label should be "Return to all clients";
if coming from referrals register or the referral notification, the label should be "Return to referrals"