added thumbnail to workspaces, only show image if available

Author: yvess

vue/src/components/SnapshotList.vue

@@ -18,7 +18,7 @@
         :to="createRouteLink(snapshot.pk)">
           <v-list-item-avatar tile size="64" class="my-2">
             <v-img
-              v-if="snapshot.screenshot"
+              v-if="snapshot.thumbnail"
               :src="djangobaseurl + '/media/' + snapshot.thumbnail">
             </v-img>
           </v-list-item-avatar>
@@ -28,6 +28,7 @@
           </v-list-item-content>
           <v-list-item-action style="margin:0 0 4px 0; align-self: flex-end;">
             <v-btn icon
+              v-if="snapshot.screenshot"
               v-on:click.stop="doThis"
               :href="djangobaseurl + '/media/' + snapshot.screenshot + '?download'"
               target="_blank">

vue/src/views/Workspace.vue

@@ -144,6 +144,7 @@ export default {
               title
               topic
               screenshot
+              thumbnail
             }
           }
 
@@ -160,6 +161,7 @@ export default {
                 title
                 topic
                 screenshot
+                thumbnail
               }
             }
           }