Fixes the bug with undefined translations for Donut WelcomeTip
Fixes #90 WS: css float bug
fixed #83 Don't show welcome tips to old users
fixes #86 Context menu is doubled
fixes #93 Show FBL for websites after warning screen is skipped
fixed #92 add a/b testing for welcome tips
Added a super-settings for debug purposes
Added "clear cache" button to extra settings page
Updated version: 1.4.10 / 20130311
Merge branch 'master' into manifest-v1