update tests to work with sync undomanager events

package.json

@@ -99,7 +99,7 @@
         "c9.ide.run": "#71c5562e42",
         "c9.ide.run.build": "#ad45874c88",
         "c9.ide.run.debug.xdebug": "#b91d23f48b",
-        "c9.ide.save": "#b876d87d55",
+        "c9.ide.save": "#3cb206c168",
         "c9.ide.terminal.monitor": "#b0b4d03280",
         "c9.ide.theme.flat": "#b1d65fa9bb",
         "c9.ide.threewaymerge": "#229382aa0b",