Bug 15978: Use Font Awesome icons for guided reports error dialog

Bug 15978: Use Font Awesome icons for guided reports error dialog

If you try to save an SQL report with an invalid authorized value
placeholder you will be presented with a confirmation dialog. This patch
updates it to use Font Awesome icons.

Also fixed: Validation error found in testing: Duplicated <form> tag and
series of redundant inputs. Each input cut had an exact duplicate in the
same form.

To test, apply the patch and go to Reports -> Create from SQL.

- Create a new SQL report and fill in as many fields as possible to
  verify correct operation.
- Try to save your report with an invalid authorized value
  placeholder, for example: SELECT * FROM items WHERE items.itype =
  <<foo|bar>>
- Confirm that the confirmation dialog is styled correctly.
- Test the operation of the "Edit SQL" button. You should be sent back a
  page.
- Test the operation of the "Save anyway" button and confirm that your
  report was saved.
- Repeat these steps when editing an existing report.

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

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