Fix show-more being displayed over chat messages.

[nomadturk]

With this PR I tried fixing #366 by changing it's position to relative. It wasn't a pretty sight to see "Show more" bar on existing chat messages.

[nomadturk]

[xPaw]

There's this css which needs to be removed, otherwhise there's too much space with this change.

#chat .show-more.show + .messages .msg:first-child {
    padding-top: 47px !important;
}

#chat .show-more.show + .messages .msg:first-child > span {
    padding-top: 52px !important;
}

#chat .msg:first-child > span {
    padding-top: 10px;
}

[nomadturk]

@xPaw , thanks for contributing. That's indeed way better.

[xPaw]

👍

[astorije]

@nomadturk, would you mind squashing these 2 commits please?
Thanks for this contribution! :-)