Update tabs.jsp

Load jQuery over HTTPS instead of HTTP. Fixes tab list not showing on Chrome browser. Original error message: "[blocked] The page at 'https://chrometabcloud.appspot.com/tabs.jsp' was loaded over HTTPS, but ran insecure content from 'http://ajax.googleapis.com/ajax/libs/jquery/1.4.2/jquery.min.js': this content should also be loaded over HTTPS."