Prevent drag and drop while pad is loading

PlayWall/src/main/java/de/tobias/playpad/layout/desktop/pad/DesktopPadDragListener.java

@@ -104,6 +104,10 @@ public class DesktopPadDragListener implements EventHandler<DragEvent> {
 			final PadContentRegistry registry = PlayPadPlugin.getRegistries().getPadContents();
 			final List<PadContentFactory> supportedContentTypes = registry.getPadContentConnectsForFiles(paths);
 
+			if (currentPad.getContent() != null && currentPad.getContent().isPadLoaded()) {
+				return;
+			}
+
 			final List<ContentDragOption> contentDragOptions = new ArrayList<>(supportedContentTypes);
 
 			if (currentPad.getContent() instanceof Playlistable) {

PlayWallPlugins/PlayWallPluginContentPlayer/src/main/scala/de/tobias/playpad/plugin/content/pad/ContentPlayerPadContent.scala

@@ -169,7 +169,7 @@ class ContentPlayerPadContent(val pad: Pad, val `type`: String) extends PadConte
 	 */
 
 	override def isPadLoaded: Boolean = {
-		mediaPlayers.isNotEmpty
+		mediaPlayers.isNotEmpty && mediaPlayers.stream().anyMatch(player => player.mediaPlayer.getStatus == MediaPlayer.Status.UNKNOWN)
 	}
 
 	/**