nextcloud-server/apps/federatedfilesharing/css/settings-personal.scss

#fileSharingSettings h2 {
	display: inline-block;
}

#fileSharingSettings img {
	cursor: pointer;
}

#fileSharingSettings xmp {
	margin-top: 0;
	white-space: pre-wrap;
}

#fileSharingSettings .icon {
	background-size: 16px 16px;
	display: inline-block;
	position: relative;
	top: 3px;
	margin-left: 5px;
}

[class^="social-"], [class*=" social-"] {
	background-repeat: no-repeat;
	background-position: 8px;
	min-width: 16px;
	min-height: 16px;
	padding-left: 28px;
	background-size: 16px;
}

.social-diaspora {
	@include icon-color('social-diaspora', 'federatedfilesharing', $color-black);
}
.social-twitter {
    @include icon-color('social-twitter', 'federatedfilesharing', $color-black);
}
.social-facebook {
	@include icon-color('social-facebook', 'federatedfilesharing', $color-black);
}