Make the local feed initial setup async again

My previous commits made the initial sync prevent the feed screen from coming up until
it was finished. This makes that piece async again.

Author: brendanlong

plugins/backend/local/localInterface.vala

@@ -158,15 +158,21 @@ public void writeData()
 
 public async void postLoginAction()
 {
-	var children = m_feedlist.get_children();
-	foreach(var r in children)
-	{
-		var row = r as SuggestedFeedRow;
-		if(row.checked())
+	SourceFunc callback = postLoginAction.callback;
+	new GLib.Thread<void*>(null, () => {
+		var children = m_feedlist.get_children();
+		foreach(var r in children)
 		{
-			FeedReaderBackend.get_default().addFeed(row.getURL(), row.getCategory(), false);
+			var row = r as SuggestedFeedRow;
+			if(row.checked())
+			{
+				FeedReaderBackend.get_default().addFeed(row.getURL(), row.getCategory(), false);
+			}
 		}
-	}
+		Idle.add((owned) callback);
+		return null;
+	});
+	yield;
 }
 
 public string buildLoginURL()