Metadata/Video Library: Convert to using MetadataFactory and MetadataResults Dialog.

Switch the video library to use the new MetadataFactory and MetadataResultDialog classes, simplifying the video dialog code further.

Update all myth themes to move the former "moviesel" window into base as "MythMetadataResults."

Author: Robert McNamara

mythtv/libs/libmythmetadata/videoscan.cpp

@@ -79,9 +79,6 @@ class VideoScannerThread : public QThread
         m_DBDataChanged(false)
     {
         m_dbmetadata = new VideoMetadataListManager;
-        VideoMetadataListManager::metadata_list ml;
-        VideoMetadataListManager::loadAllFromDatabase(ml);
-        m_dbmetadata->setList(ml);
         m_HasGUI = gCoreContext->HasGUI();
         m_ListUnknown = gCoreContext->GetNumSetting("VideoListUnknownFiletypes", 0);
     }
@@ -94,6 +91,11 @@ class VideoScannerThread : public QThread
     void run()
     {
         threadRegister("VideoScanner");
+
+        VideoMetadataListManager::metadata_list ml;
+        VideoMetadataListManager::loadAllFromDatabase(ml);
+        m_dbmetadata->setList(ml);
+
         QList<QByteArray> image_types = QImageReader::supportedImageFormats();
         QStringList imageExtensions;
         for (QList<QByteArray>::const_iterator p = image_types.begin();