Bug 10493: (follow-up) fix various QA issues

Bug 10493: (follow-up) fix various QA issues

Adds a new Template Toolkit filter EncodeUTF8 to encode strings
to utf8 for correct display of diactritics.

Adds the new JavaScript function removeFocus() to staff-global.js
Use this function to remove the focus from any element for
repeated scanning actions on errors so the librarian doesn't
continue scanning and miss the error.

Signed-off-by: Katrin Fischer <katrin.fischer@bsz-bw.de>
This works as described - you have to actually look at the
error and pick what you want to do or confirm it. I think
maybe tying the action to a shortcut (c = confirm or similar)
would be nice, so you can get away with only using the keyboard.

Signed-off-by: Galen Charlton <gmc@esilibrary.com>