Add multiple tag to expansion panels

src/objectList.vue

@@ -6,9 +6,9 @@
         <span>Die Objektbibliothek.</span>
       </template>
       <template #default>
-        <v-expansion-panels>
-          <VcsExpansionPanel v-for = "(subcats, categoryName) in objLib" :key="categoryName" :heading="categoryName">
-            <v-container v-for="(entries, subCategory) in subcats" :key = "subCategory" class=" py-1 px-1 border-b-md" expandable>
+        <v-expansion-panels multiple>
+          <VcsExpansionPanel v-for = "(subcats, categoryName) in objLib" :key="categoryName" :heading="categoryName" value="opened">
+            <v-container v-for="(entries, subCategory) in subcats" :key = "subCategory" class=" py-1 px-1 border-b-md">
               <v-col>
               <VcsLabel class="mb-4 text-h2">{{subCategory}}</VcsLabel>
               <v-list>