message: [style] More user friendly value select in gateway values table
diff: <v-select
  v-model="editedValue.value"
  label="Value"
  + :hint="editedValue.value ? editedValue.value.help : ''"
  required
  return-object
  :rules="[required]"
  item-text="label"
  item-value="value_id"
  :items="deviceValues"
  - ></v-select>
  + >
  + <template slot="selection" slot-scope="data">
  + {{ data.item.label + (data.item.instance > 1 ? " - Instance " + data.item.instance : "") }}
  + </template>
  + <template slot="item" slot-scope="data">
  + <template>
  + <v-list-tile-content>
  + <v-list-tile-title>{{ data.item.label + (data.item.instance > 1 ? " - Instance " + data.item.instance : "") }}</v-list-tile-title>
  + <v-list-tile-sub-title style="max-width:500px" class="text-truncate text-no-wrap">{{ data.item.help }}</v-list-tile-sub-title>
  + </v-list-tile-content>
  + </template>
  + </template>
  + </v-select>
  </v-flex>
  <v-flex xs12>
  <v-text-field
  