Added total dontaion amount to donor detail

ref #78

src/components/donors/DonorDetail.svelte

@@ -186,6 +186,10 @@
       </span>
     </div>
     <!--  -->
+    <div style="displ">
+      <span class="font-medium text-gray-700">{$_('total-donation-amount')}:</span>
+      <span>{(editable.donationAmount/100).toFixed(2).toLocaleString("de-DE", {valute: "EUR"})}€</span>
+    </div>
     <div class="text-sm w-full">
       <label
         for="firstname"