message: fix(ui): duration dropdown
diff: v-model.number="value.newValue.value"
  ></v-text-field>
  <v-select
  - style="margin-left:10px;width:20px"
  + style="margin-left:10px;min-width:100px;width:135px"
  :items="durations"
  v-model="value.newValue.unit"
  :readonly="!value.writeable || disable_send"
  + persistent-hint
  :append-outer-icon="!disable_send ? 'send' : null"
  @click:append-outer="updateValue(value)"
  ></v-select>
  