message: fix(frontend): adds obj selection handler to object viewer
diff: <v-row>
  <v-col cols="12" sm="12">
  <v-card class="pa-0" elevation="0" rounded="lg" color="transparent" style="height: 50vh">
  - <renderer :object-url="commitObjectUrl" />
  + <renderer :object-url="commitObjectUrl" @selection="handleSelection" />
  </v-card>
  <v-card class="pa-4 mt-3" elevation="0" rounded="lg">
  + <v-expand-transition>
  + <v-sheet v-show="selectionData.length !== 0" class="pa-0" color="transparent">
  + <v-card-title class="mr-8">
  + <v-badge inline :content="selectionData.length">
  + <v-icon class="mr-2">mdi-cube</v-icon>
  + Selection
  + </v-badge>
  + </v-card-title>
  + <div v-if="selectionData.length !== 0">
  + <object-simple-viewer
  + v-for="(obj, ind) in selectionData"
  + :key="obj.id + ind"
  + :value="obj"
  + :stream-id="$route.params.streamId"
  + :key-name="`Selected Object ${ind + 1}`"
  + />
  + </div>
  + </v-sheet>
  + </v-expand-transition>
  <v-card-title class="mr-8">
  <v-icon class="mr-2">mdi-database</v-icon>
  Object {{ $route.params.objectId }}
  </template>
  <script>
  import ObjectSpeckleViewer from '../components/ObjectSpeckleViewer'
  +import ObjectSimpleViewer from '../components/ObjectSimpleViewer'
  import Renderer from '../components/Renderer'
  export default {
  name: 'ObjectViewer',
  - components: { ObjectSpeckleViewer, Renderer },
  + components: { ObjectSimpleViewer, ObjectSpeckleViewer, Renderer },
  + data() {
  + return {
  + selectionData: []
  + }
  + },
  computed: {
  commitObject() {
  return {
  @@ -39,6 +64,12 @@ export default {
  commitObjectUrl() {
  return `${window.location.origin}/streams/${this.$route.params.streamId}/objects/${this.$route.params.objectId}`
  }
  + },
  + methods: {
  + handleSelection(selectionData) {
  + this.selectionData.splice(0, this.selectionData.length)
  + this.selectionData.push(...selectionData)
  + }
  }
  }
  </script>
  