Add methods to control saving caption UI

package.json

@@ -105,7 +105,7 @@
         "c9.ide.run": "#6c32e5de36",
         "c9.ide.run.build": "#ad45874c88",
         "c9.ide.run.debug.xdebug": "#61dcbd0180",
-        "c9.ide.save": "#cc613b6ead",
+        "c9.ide.save": "#52fbccc5e3",
         "c9.ide.scm": "#f3847917b8",
         "c9.ide.terminal.monitor": "#b52a3f2144",
         "c9.ide.theme.flat": "#2de8414db7",