ListView: Remove the padding

This way it properly aligns up with the hamburger menu.

I also discovered this 'debugShowMaterialGrid' option which makes
working with padding issues much much easier.

lib/app.dart

@@ -45,6 +45,7 @@ class JournalApp extends StatelessWidget {
         '/setupRemoteGit': (context) => OnBoardingScreen(onCompleted),
       },
       debugShowCheckedModeBanner: false,
+      //debugShowMaterialGrid: true,
     );
   }
 }

lib/widgets/journal_list.dart

@@ -21,7 +21,6 @@ class JournalList extends StatelessWidget {
   @override
   Widget build(BuildContext context) {
     return new ListView.builder(
-      padding: const EdgeInsets.all(8.0),
       itemBuilder: (context, i) {
         if (i >= notes.length) {
           return null;