Make "settings" menu item work

[sorgoz]

At present, "Settings" menu item (when right-clicked on addon icon) is disabled for WOT addon.

Other addons provide this feature to open Settings page of addon.

[sorgoz]

screenshot: https://skitch.com/sorgoz/8y7fc/skitched-20120212-195936

[sorgoz]

Settings menu item can be enabled if there is options.html page placed in addon.
http://dev.opera.com/articles/view/opera-extensions-options-page/

Unfortunately, this method doesn't allow change page's location (Same Origin Policy violated). And Opera blocks opening new tab and making ajax request to mywot.com.

[sorgoz]

found not-so-brilliant workaround: show button "open settings page on mywot.com" on the "options" page. Open real settings page by clicking on the button.

Probably it needs some localization in future.