Define basic structure that will be followed.
Change name of myUIExtensions.js to utilities.js.

I am planning on adding a couple of functions to this.
Switch utilties JS to use the module pattern.

This is simply an organizational move that should eventually help keep the code organized as it grows.
Put the show/hide button code into its own private module.
Add the syncHiddenElement function to utilities.

This is used in a few different views, and thus needs to be somewhere common.