Merge remote-tracking branch 'origin/master'

lib/common/style/TitleBar.dart

@@ -22,14 +22,14 @@ class TitleBar {
     return AppBar(
           title: Text(
             title,
-            style: TextStyle(color: GSYColors.primaryDarkValue, fontSize: 16),
+            style: TextStyle(color: Colors.white, fontSize: 16),
           ),
           centerTitle: true,
           leading: BackButton(),
           brightness: Brightness.light,
           backgroundColor: Color(0xFF4875EC),
           elevation: 0,
-          iconTheme: IconThemeData(color: GSYColors.primaryDarkValue),
+          iconTheme: IconThemeData(color: Colors.white),
         );
   }