Bug 30304: Reindent lists template in the staff interface

Bug 30304: Reindent lists template in the staff interface

This patch performs general template cleanup to the lists template:
Make indentation consistent, replace tabs with spaces, and trim trailing
whitespace.

To test, apply the patch and test all aspects of the lists pages,
including:

- Viewing the list of public and private lists.
- List of lists DataTable controls: Paging, filtering, sorting.
- Add, edit and delete lists.
- View list contents.
- Remove titles from a list.
- Place hold from a list.
- Add items to a list.

Use your preferred method for checking the differences between files
while ignoring whitespace. I use diff with the  "-w" flag. The only
changes you see should be split lines.

Signed-off-by: Katrin Fischer <katrin.fischer.83@web.de>
Signed-off-by: Lucas Gass <lucas@bywatersolutions.com>
Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>