Used different CSS-only tab technique. The implementation before
messed up the whole height of the page and used unnecessary
absolute positioning.
Added comment icon from MFG Labs iconset (SIL)
- https://github.com/MfgLabs/mfglabs-iconset
Added outlined and filled heart from Elusiv icons (SIL)
- https://github.com/dovy/elusive-iconfont
Time ago seconds should be rounded.
