UI: Change the view of the topic list

Some problems: (according to discussion):
1. It's difficult to distinguish a topic title from created-by block (topic-starter and branch names).
2. On the large screens so much empty space between columns.

Some ideas for a solution from users:

1. Increase space between topics.
2. Decrease font size for topic-starter name and branch name.
3. Topic-starter name and branch name don't mark as link. Make link near text as a icon.
4. For large screens make special markup (Responsive design).
5. Leave branch name and author name links but make those links black as usual text
6. Use different colors for topic title and created-by block. Don't use italic font.