Fix pull to refresh

lib/ui/client/view/client_view.dart

@@ -69,7 +69,8 @@ class _ClientViewState extends State<ClientView>
           ),
         ],
       ),
-      body: Column(
+      body: Builder(builder: (context) {
+        return Column(
           children: <Widget>[
             Expanded(
               child: TabBarView(
@@ -102,7 +103,8 @@ class _ClientViewState extends State<ClientView>
               action2: EntityAction.newInvoice,
             ),
           ],
-      ),
+        );
+      }),
       floatingActionButton: FloatingActionButton(
         heroTag: 'client_view_fab',
         backgroundColor: Theme.of(context).primaryColorDark,

lib/ui/expense/view/expense_view.dart

@@ -68,7 +68,8 @@ class _ExpenseViewState extends State<ExpenseView>
           ),
         ],
       ),
-      body: TabBarView(
+      body: Builder(builder: (context) {
+        return TabBarView(
           controller: _controller,
           children: <Widget>[
             RefreshIndicator(
@@ -85,7 +86,8 @@ class _ExpenseViewState extends State<ExpenseView>
                   viewModel: viewModel, expense: viewModel.expense),
             ),
           ],
-      ),
+        );
+      }),
       floatingActionButton: company.isEnterprisePlan
           ? Builder(builder: (BuildContext context) {
               return FloatingActionButton(

lib/ui/vendor/view/vendor_view.dart

@@ -56,7 +56,8 @@ class _VendorViewState extends State<VendorView>
           ),
         ],
       ),
-      body: TabBarView(
+      body: Builder(builder: (context) {
+        return TabBarView(
           controller: _controller,
           children: <Widget>[
             RefreshIndicator(
@@ -68,7 +69,8 @@ class _VendorViewState extends State<VendorView>
               child: VendorViewDetails(vendor: viewModel.vendor),
             ),
           ],
-      ),
+        );
+      }),
       floatingActionButton: FloatingActionButton(
         heroTag: 'vendor_view_fab',
         backgroundColor: Theme.of(context).primaryColorDark,

lib/utils/completers.dart

@@ -29,12 +29,13 @@ Completer<Null> refreshCompleter(BuildContext context) {
 Completer<T> snackBarCompleter<T>(BuildContext context, String message,
     {bool shouldPop = false}) {
   final Completer<T> completer = Completer<T>();
+  final scaffold = Scaffold.of(context);
 
   completer.future.then((_) {
     if (shouldPop) {
       Navigator.of(context).pop();
     }
-    Scaffold.of(context).showSnackBar(SnackBar(
+    scaffold.showSnackBar(SnackBar(
         content: SnackBarRow(
       message: message,
     )));