1.7.1

1. Handle case where firmware is not a string.
2. Map icon for "squeezebox3"
3. Cancel timer in sleep dialog if closed by 'esc' or no players.
4. Allow changing player icons.
5. Ignore 'esc' when confirm, and simple text entry, dialogs are shown.
6. Show spinning progress in 'Information' dialog when downloading plugins or scanning database.
7. Hide player name and icon in 'Player settings' dialog if password set and not matched.
8. Hide create, edit, and delete group options in 'Mange players' dialog if password set and not matched.
9. Only bind one handler to all volume buttons, and use element id to determine action to take.