crowdstf/res/app/control-panes/activity/activity.css

.stf-activity .activity-list .activity-date,
.stf-activity .activity-list .activity-buttons {
  opacity: 0;
  transition: opacity 0.25s ease-in-out;
}

.stf-activity .activity-list li:hover .activity-date,
.stf-activity .activity-list li:hover .activity-buttons {
  opacity: 1;
}

.stf-activity .activity-title {
  display: inline-block;
}

.stf-activity .activity-icon {
  width: 30px;
  height: 30px;
}

.stf-activity {
  background: #e8e8e8;
}