Permalinks and conversations fixes

- Background is taking all height, then we don't see anymore users' custom background on permalinks (line 67 for this)
- Permalinks conversations (previous and respones) are no longer showing in two collums, better the thread. (112~117)
- Fixed name and username left padding (218~221)
- Only add padding-left on name and usernames that are in the twitter stream (fixes permalinks padding - 240~242)
- Removed that big footer, we don't need that. (ex-270/283)
- Fixed top border-radius of the first tweet when we open a conversation from the stream. (395~397)
- Fixed padding + align the name and username with the pictures (399~409)
- Quick-reply at end of expanded tweet was put a bit more highter to "stick" with the tweet. (454)