Bug 16032 - Use Font Awesome icon in "note" styled divs

 Bug 16032 - Use Font Awesome icon in "note" styled divs

Several pages use <div class="note"> to display important information
about the functionality on the page. The style of this div can be
modified to use Font Awesome, eliminating an image file.

To test, apply the patch and clear your browser cache if necessary.

- Go to Administration -> Authorized values.
- Confirm that the "NOTE" box is styled correctly.
- Edit an existing authorized value.
- Confirm that the "NOTE" box is styled correctly.

- Go to Tools -> Batch record deletion.
- Submit a batch of biblionumbers.
- Confirm that the "Reminder" box is styled correctly.
- Go back and submit a batch of authority numbers.
- Confirm that the "Reminder" box is styled correctly.

- Go to Tools -> Batch record modification.
- Submit a batch of biblionumbers.
- Confirm that the "Reminder" box is styled correctly.
- Go back and submit a batch of authority numbers.
- Confirm that the "Reminder" box is styled correctly.

- Check that there are no other references to "note.png" in the
  templates.

Followed test plan, works as expected
Signed-off-by: Marc Véron <veron@veron.ch>
Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>
Signed-off-by: Brendan A Gallagher <brendan@bywatersolutions.com>