Unfocus search on tap away

Frontend/lib/mih_packages/mzansi_wallet/mih_wallet.dart

@@ -49,6 +49,7 @@ class _MihWalletState extends State<MihWallet> {
       iconSize: 35,
       onTap: () {
         Navigator.of(context).pop();
+        FocusScope.of(context).unfocus();
       },
     );
   }