Bug 15785 - Use Font Awesome icons in confirmation dialogs

Bug 15785 - Use Font Awesome icons in confirmation dialogs

We can simplify the staff client's CSS and reduce some image file usage
if we modify confirmation dialogs to use Font Awesome icons. This patch
makes this change for Administration templates.

This patch includes some whitespace changes, so please consider that
when looking at diffs.

To test, apply the patch and test deletion in the following cases. Test
both confirmation and cancel actions.

Administration -> Budgets -> Delete budget
Administration -> Funds -> Delete fund
Administration -> Authority types -> Delete authority type
Administration -> Authority types -> MARC Structure -> Delete tag
Administration -> Authority types -> MARC Structure -> Subfields -> Delete
Administration -> MARC bibliographic framework -> Delete framework
Administration -> MARC bibliographic framework -> MARC structure -> Delete
Administration -> Cities and Towns -> Delete city
Administration -> Classification sources -> Delete classification source
Administration -> Classification sources -> Delete classification filing rule
Administration -> Item types -> Delete
Administration -> Record matching rules -> Delete
Administration -> Patron attribute types -> Delete

Signed-off-by: Hector Castro <hector.hecaxmmx@gmail.com>
Works as advertised. Icons changed

Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>
Signed-off-by: Brendan Gallagher brendan@bywatersolutions.com