Stop playBookmak from being updated when a song is paused.

cli/src/main/groovy/com/jdbernard/wdiwtlt/cli/CommandLineInterface.groovy

@@ -393,7 +393,10 @@ Configuration:
                         dismissMsgDate = new Date(new Date().time + msgTimeout) } } }
             else {
                 drawLeader()
-                if (curMediaFile && System.currentTimeMillis() > nextBookmarkUpdate) {
+                if (curMediaFile &&
+                    vlcj.mediaListPlayer.mediaPlayer.isPlaying() &&
+                    System.currentTimeMillis() > nextBookmarkUpdate) {
+
                     playBookmark.playTimeMs =
                         vlcj.mediaListPlayer.mediaPlayer.time
                     library.save(playBookmark)