Some very small improvements

- Use half_content beside style 50% (or 49.9%), half_content designed to be 100% on mobile view so it won't make things look so small.
- Contain lastpost items with p element so it'll level with stats (it has 3px margin-top)
- and luvly typo :P

Signed-off-by: Antes <antes@simplemachines.org>