Don't show the search box for GS and Spotify if user isn't logged in

src/internet/groovesharkservice.cpp

@@ -166,7 +166,9 @@ void GroovesharkService::ShowConfig() {
 }
 
 QWidget* GroovesharkService::HeaderWidget() const {
-  return search_box_;
+  if (IsLoggedIn())
+    return search_box_;
+  return NULL;
 }
 
 void GroovesharkService::Search(const QString& text, bool now) {

src/internet/spotifyservice.cpp

@@ -503,7 +503,9 @@ PlaylistItem::Options SpotifyService::playlistitem_options() const {
 }
 
 QWidget* SpotifyService::HeaderWidget() const {
-  return search_box_;
+  if (IsLoggedIn())
+    return search_box_;
+  return NULL;
 }
 
 void SpotifyService::EnsureMenuCreated() {