* Save last 5 passwords.
* Move password history to seperate page.
* Use the util helpers for accessing the local storage.
* Change close to back for password history. Remove unused html.
* Change orderBy to use the date instead of magic array.
* Move historyService to background.
* Add passwords generated from shortcut and contextmenu to history.
* Fix return to edit/add not working in password generator history.
* Change password icon to clipboard.
* Change link to password history to use on-click.
* Clear password generator history on logout.
* Code style fix.
* Add new .wrap class for wrapping long text. Fix password icon.
* Fix password generation's handling of the ambiguous option.
Fixes#97
* Invert options.ambiguous's value in the UI.
options.ambiguous means "allow ambiguous characters", however the
checkbox is labeled "avoid ambiguous characters". inverse the value at
display time to reflect to reflect reality.
