Increase the size of the moodbar cache to 60MB. Fixes issue 3052.

src/moodbar/moodbarloader.cpp

@@ -40,7 +40,7 @@ MoodbarLoader::MoodbarLoader(Application* app, QObject* parent)
     save_alongside_originals_(false)
 {
   cache_->setCacheDirectory(Utilities::GetConfigPath(Utilities::Path_MoodbarCache));
-  cache_->setMaximumCacheSize(10 * 1024 * 1024); // 10MB - enough for 3333 moodbars
+  cache_->setMaximumCacheSize(60 * 1024 * 1024); // 60MB - enough for 20,000 moodbars
 
   connect(app, SIGNAL(SettingsChanged()), SLOT(ReloadSettings()));
   ReloadSettings();