Icon of CommentStreams misplaced with Tweeki skin

[krabina]

In the "Kommentar hinzufügen" field of the Comment Streams extension, the icon is misplaced. This does not happen in chameleon or vector skin.

see also: https://phabricator.wikimedia.org/T255892

I guess the problem is:

body .oo-ui-buttonElement-button {
    padding: .3rem 1rem !important;
}