Image loop group selector incorrect after page refresh

[douglatornell]

Original report by Doug Latornell (Bitbucket: douglatornell, GitHub: douglatornell).

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Reported by @mdunphy.

Steps to reproduce:

• Select a model variable other than the one at the top of the selector list; the image loop for that variable appears
• Refresh the page; the image loop changes to the one for the model variable at the top of the selector list, but the selected model variable remains the one that was chosen before the page refresh

I think this is happening because the JavaScript code in the init_image_loop_group() template function that is fired by thy the page body load event is setting the image loop to display the the 1st one in the list, but the value in the selector is not changed by a page refresh.
The init code should pick up the model variable to display the loop for from the selector.

[douglatornell]

Original comment by Doug Latornell (Bitbucket: douglatornell, GitHub: douglatornell).

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Figure groups have the same problem.