adicionando instrumentos no editor de patterns

assets/js/creations/file.js

@@ -660,7 +660,7 @@ export async function parseMmpContent(xmlString) {
 
   const firstInst = newTracks.find((t) => t.type !== "bassline");
   appState.pattern.activeTrackId = firstInst ? firstInst.id : null;
-  appState.pattern.activePatternIndex = 0;
+  appState.pattern.activePatternIndex = null;
 
   loadStateFromSession();