added donor receipt list download to DonorsOverview

ref #132

src/components/donors/DonorsOverview.svelte

@@ -1,5 +1,5 @@
 <script>
-  import { getLocaleFromNavigator, _ } from "svelte-i18n";
+  import { _ } from "svelte-i18n";
   import { DonationService, DonorService } from "@odit/lfk-client-js";
   import store from "../../store";
   import DonorsEmptyState from "./DonorsEmptyState.svelte";