Fix the alignment of the title in Stock app

sky/examples/stocks-fn/stocksapp.dart

 library stocksapp;
 
 import '../../framework/fn.dart';
 import '../../framework/animation/scroll_behavior.dart';
 import '../../framework/components/drawer.dart';
 import '../../framework/components/drawer_header.dart';
 import '../../framework/components/fixed_height_scrollable.dart';
 import '../../framework/components/floating_action_button.dart';
 import '../../framework/components/icon.dart';
 import '../../framework/components/input.dart';
@@ skipping 14 matching lines @@
 
   static Style _style = new Style('''
     display: flex;
     flex-direction: column;
     height: -webkit-fill-available;
     font-family: 'Roboto Regular', 'Helvetica';
     font-size: 16px;'''
   );
 
   static Style _iconStyle = new Style('''
-    padding: 8px;
-    margin: 0 4px;'''
+    padding: 8px;'''
   );
 
   static Style _titleStyle = new Style('''
-    flex: 1;
-    margin: 0 4px;'''
+    padding-left: 24px;
+    flex: 1;'''
   );
 
   List<Stock> _sortedStocks;
   bool _isSearching = false;
   String _searchQuery;
 
   StocksApp() : super() {
     _sortedStocks = oracle.stocks;
     _sortedStocks.sort((a, b) => a.symbol.compareTo(b.symbol));
   }
@@ skipping 83 matching lines @@
           key: 'Content',
           style: _style,
           children: [toolbar, list]
         ),
         fab,
         drawer,
       ]
     );
   }
 }