XenForo [JoyFreak] Postbit Cover

This fix will:

1. Remove the postbit cover from mobile devices.
2. Allow username to be clickable for those with a postbit cover.

Add to extra.less:

Code:

.message-name {
    position: relative;
}

@media (max-width: 650px) {
.postbit_background {
    display: none;
}
}