(fix) missing scrollbar in browse mode on some pc's

(added) div columns, background hover option

(added) option to use multiple newsletter widgets with same database tables

(update) Blog/Podcast (MYSQL only) comments update: multilevel comments (comments on comments), possibility tp use html subset in comments, possibility to include url's and images (optional), name, email and captcha is removed when user is logged

(added) Blog/Podcast (MYSQL only) option to limit number of characters in sidebar macros