Enable filter for the test panel tree

package.json

@@ -91,7 +91,7 @@
         "c9.ide.immediate": "#6845a93705",
         "c9.ide.installer": "#be8d9aa07c",
         "c9.ide.mount": "#816dbe987b",
-        "c9.ide.navigate": "#f358997d93",
+        "c9.ide.navigate": "#dcb08387ae",
         "c9.ide.newresource": "#f1f0624768",
         "c9.ide.openfiles": "#28a4f5af16",
         "c9.ide.preview": "#c530a7978d",