message: fix(panel): keep dict height unchanged when there is nothing
diff: }
  .panel-DictItem_BodyMesure {
  - padding: 10px 0;
  -
  // clear margin collapsing which seems to causing flickering
  // when changing the parent height
  + overflow: hidden;
  +
  > *:first-child {
  - margin-top: 0 !important;
  + margin-top: 10px !important;
  }
  > *:last-child {
  - margin-bottom: 0 !important;
  + margin-bottom: 10px !important;
  }
  }
  