Migrate to positioning-strategy prop

app/assets/javascripts/content_editor/components/toolbar_table_button.vue

@@ -79,9 +79,6 @@ export default {
   },
   MAX_COLS,
   MAX_ROWS,
-  popperOptions: {
-    strategy: 'fixed',
-  },
 };
 </script>
 <template>
@@ -93,7 +90,7 @@ export default {
     icon="table"
     :aria-label="__('Insert table')"
     :toggle-text="__('Insert table')"
-    :popper-opts="$options.popperOptions"
+    positioning-strategy="fixed"
     class="content-editor-table-dropdown"
     text-sr-only
     :fluid-width="true"

app/assets/javascripts/vue_shared/components/markdown/comment_templates_dropdown.vue

@@ -71,7 +71,6 @@ export default {
       }
     },
   },
-  popperOptions: { strategy: 'fixed' },
 };
 </script>
 
@@ -89,7 +88,7 @@ export default {
       searchable
       size="small"
       class="comment-template-dropdown"
-      :popper-options="$options.popperOptions"
+      positioning-strategy="fixed"
       :searching="$apollo.queries.savedReplies.loading"
       @shown="fetchCommentTemplates"
       @search="setCommentTemplateSearch"