message: Changed show catalog on mouseover
diff: <path d="M51.704 51.273L36.844 35.82c3.79-3.8 6.14-9.04 6.14-14.82 0-11.58-9.42-21-21-21s-21 9.42-21 21 9.42 21 21 21c5.082 0 9.747-1.817 13.383-4.832l14.895 15.49c.196.206.458.308.72.308.25 0 .5-.093.694-.28.398-.382.41-1.015.028-1.413zM21.984 40c-10.478 0-19-8.523-19-19s8.522-19 19-19 19 8.523 19 19-8.525 19-19 19z"/>
  </svg>
  <div class="dragarea" ref="dragarea"></div>
  - <svg class="icon-options" @click="isShowCatalog = true" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 612 612">
  + <svg class="icon-options" @mouseover="isShowCatalog = true" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 612 612">
  <path d="M0 97.92v24.48h612V97.92H0zm0 220.32h612v-24.48H0v24.48zm0 195.84h612V489.6H0v24.48z"/>
  </svg>
  <svg class="icon-notebook" @click.left="addNewWord" @click.right.prevent="openNoteBook" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 512 512">
  