Fix copy export download link for old exports

The copy event handler was missing.

Author: davelopez

client/src/components/History/Export/HistoryExport.vue

@@ -292,6 +292,7 @@ const breadcrumbItems = computed(() => [
                 :records="previousExportRecords"
                 class="mt-3"
                 @onDownload="downloadFromRecord"
+                @onCopyDownloadLink="copyDownloadLinkFromRecord"
                 @onReimport="reimportFromRecord" />
         </GModal>
     </div>