.messaging-box fieldset {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-start;
  overflow: scroll;
  height: 50ex;
  line-height: 2.5ex;
}
.messaging-box fieldset div {
  width: 300px;
}
.messaging-box fieldset input[type="checkbox"] {
  margin-right: 5px;
  margin-left: 3px;
}