Fix default types in `open-assets` command. Closes #1411

src/commands/view/OpenAssets.js

@@ -14,9 +14,9 @@ module.exports = {
     am.onSelect(opts.onSelect);
 
     if (!this.rendered || types) {
-      let assets = am.getAll();
+      let assets = am.getAll().filter(i => 1);
 
-      if (types) {
+      if (types && types.length) {
         assets = assets.filter(a => types.indexOf(a.get('type')) !== -1);
       }