turn off layer isolation via script

@Hey Evgenii 

Some menu commands need to be inserted into an action step to be successfully recorded by ScriptListener. Here is the SL code cleaned and put into a function:

isolateLayers();

function isolateLayers() {
	function s2t(s) {
        return app.stringIDToTypeID(s);
    }
	var descriptor = new ActionDescriptor();
	var reference = new ActionReference();
	reference.putEnumerated( s2t( "layer" ), s2t( "ordinal" ), s2t( "targetEnum" ));
	descriptor.putReference( s2t( "null" ), reference );
	executeAction( s2t( "isolateLayers" ), descriptor, DialogModes.NO );
}

Or you can just call the menu item as follows:

app.runMenuItem(stringIDToTypeID('isolateLayers'));

Hope this helps!