Debug in Admin->Offline Transaction Management

Debug in Admin->Offline Transaction Management

This adds the same faded Debug label that you see in various interfaces like the
one that wraps the embedded OPAC, but when you click on it, instead of letting
you modify a URL, etc., it copies the path for the user/profile directory to the
clipboard and shows the same directory in an alert popup.  This is the directory
where a local copy of offline transactions are preserved.

As a bonus, since the label is localized, I went ahead and updated the Debug
label from the browser wrapper interface with the same DTD entity.

Signed-off-by: Jason Etheridge <jason@esilibrary.com>