CME Extensions: finding the unique button IDs

In my last post I covered the example of a Tridion 2011 CME extension that would show nice pop-ups of not very useful information. For this we registered, in our HelloWorld.config, where the button  would be loaded and in our Home ribbon we register the button as: <ext:extension pageid=”HomePage” groupid=”EditGroup” name=”HelloWorld” assignid=”HelloWorld” insertbefore=”PreviewBtn”> Amongst our…