Fixed few bugs with favorite timelines on start page.

Details:
- fixed bug when favorite timelines were not displayed for authorized user;
- fixed bug when some of favorite timelines were displayed in flip list of featured timelines;
- returned author name for favorite timeline.
Add support of removing favorite timelines.

Details:
- "favorite" button of timeline now also can remove timelien from favorites;
- fixed issue when "favorite" button of timeline wasn't visible after editing timeline;
- fixed issue when nothing was displayed for featured and favorite timelines without title.
Merge pull request #1152 from alex-zen/bugfix

Fixed few bugs with favorite timelines on start page.