resize the tree when needed

package.json

@@ -66,7 +66,7 @@
         "c9.ide.language.javascript.tern": "#de02f4d128",
         "c9.ide.language.javascript.infer": "#4c9a4282ff",
         "c9.ide.language.jsonalyzer": "#0717d1510f",
-        "c9.ide.collab": "#b49eda3791",
+        "c9.ide.collab": "#50b948d22c",
         "c9.ide.local": "#a9703b630c",
         "c9.ide.find": "#35379124ca",
         "c9.ide.find.infiles": "#c132ad243c",