phase3: precise nullable-condition fixes (if(x)->if(x==true), analyzer-driven). 399->379

lib/widgets/mobile/shop.dart

@@ -508,7 +508,7 @@ class ShopState extends State<Shop>
 
     stack.children.addAll(children);
 
-    if (!_business.isPublic) {
+    if (_business.isPublic != true) {
       stack.children.add(
         Positioned(
           top: 0,
@@ -1821,7 +1821,7 @@ class ShopState extends State<Shop>
       return;
     }
     checkCloseFlag = true;
-    if (business.forceClose) {
+    if (business.forceClose == true) {
       showDialog(
           context: context,
           builder: (BuildContext context) {