message: fix(ui): hide download/save button when file is not supported
diff: style="height: calc(100% - 50px)"
  >
  <prism-editor
  + v-if="!notSupported"
  class="custom-font"
  lineNumbers
  v-model="fileContent"
  :highlight="highlighter"
  ></prism-editor>
  </v-card-text>
  - <v-card-actions>
  + <v-card-actions v-if="!notSupported">
  <v-spacer></v-spacer>
  <v-btn
  color="purple darken-1"
  @@ -215,6 +216,7 @@ export default {
  active: [],
  items: [],
  fileContent: '',
  + notSupported: false,
  loadingStore: true,
  loadingFile: false,
  }
  @@ -386,6 +388,7 @@ export default {
  !this.selected.children
  ) {
  this.fileContent = ''
  + this.notSupported = false
  this.loadingFile = true
  try {
  if (!this.allowedExt.includes(this.selected.ext)) {
  @@ -400,6 +403,7 @@ export default {
  throw Error(data.message)
  }
  } catch (error) {
  + this.notSupported = true
  this.showSnackbar(error.message)
  }
  