NodeBB/public/less/admin/manage/groups.less

.group {
	[component="groups/members"] {
		padding: 0;
		tbody {
			max-height: 500px;
			display: block;
			overflow-y: auto;
			padding-bottom: 100px;
			.member-name {
				width: 100%;
			}
		}


		img {
			width: 32px;
			height: 32px;
		}
	}
}