Convert the bulk of modules over to RedrawFunc

modules/hackernews/widget.go

@@ -67,10 +67,6 @@ func (widget *Widget) Refresh() {
 
 // Render sets up the widget data for redrawing to the screen
 func (widget *Widget) Render() {
-	if widget.stories == nil {
-		return
-	}
-
 	widget.RedrawFunc(widget.content)
 }
 
@@ -79,6 +75,9 @@ func (widget *Widget) Render() {
 func (widget *Widget) content() (string, string, bool) {
 	title := fmt.Sprintf("%s - %s stories", widget.CommonSettings().Title, widget.settings.storyType)
 	stories := widget.stories
+	if stories == nil || len(stories) == 0 {
+		return title, "No stories to display", false
+	}
 	var str string
 
 	for idx, story := range stories {