Update test list when changing setting in preferences

package.json

@@ -108,7 +108,7 @@
         "c9.ide.save": "#a2820d0ea1",
         "c9.ide.scm": "#930a9e6f00",
         "c9.ide.terminal.monitor": "#35afa7f97f",
-        "c9.ide.test": "#8741b1957e",
+        "c9.ide.test": "#0ac3d75a83",
         "c9.ide.test.mocha": "#7844e1dc83",
         "c9.ide.theme.flat": "#92cda0fb40",
         "c9.ide.threewaymerge": "#229382aa0b",