Slideshow functioning is not as expected

[jillpe]

Summary

It seems like the slideshow view is broken. No matter the selected item, it always begins at #1, the forward/backward buttons are broken and hidden, and the slideshow seems to display all of the collection's items vertically.

Here is an example: https://cooper.hykucommons.org/collections/4714908b-3f68-4822-a2ea-170937e42521?locale=en&view=slideshow

Acceptance Criteria

• Forward/back buttons are unhidden and function
• Display of items is the correct orientation
• Slideshow begins on the image selected