fix handling of defult python 3

package.json

@@ -83,7 +83,7 @@
         "c9.ide.help.support": "#60e88f5680",
         "c9.ide.imgeditor": "#08bbc53578",
         "c9.ide.immediate": "#6845a93705",
-        "c9.ide.installer": "#7a007515b5",
+        "c9.ide.installer": "#028fb34f31",
         "c9.ide.mount": "#32e79866ee",
         "c9.ide.navigate": "#64156c7f4a",
         "c9.ide.newresource": "#9a7464cc47",