Add dynamic button caption

package.json

@@ -106,7 +106,7 @@
         "c9.ide.run.build": "#0598fff697",
         "c9.ide.run.debug.xdebug": "#5c004d2d75",
         "c9.ide.save": "#5118b30230",
-        "c9.ide.scm": "#67c3cf66b3",
+        "c9.ide.scm": "#042871e480",
         "c9.ide.terminal.monitor": "#35afa7f97f",
         "c9.ide.test": "#520fa1e6c5",
         "c9.ide.test.mocha": "#7844e1dc83",