fix: hide bottom border of first sum and vat columns in chrome

src/components/Positions.tsx

@@ -182,7 +182,7 @@ const Positions: Component<{
           </For>
           <Show when={localState.vatRate > 0}>
             <tr class="h-12">
-              <th class="!relative"></th>
+              <th class="!relative border-b-0"></th>
               <td class="align-bottom">Summe</td>
               <td></td>
               <td></td>
@@ -191,7 +191,7 @@ const Positions: Component<{
               </td>
             </tr>
             <tr>
-              <th class="!relative"></th>
+              <th class="!relative border-b-0"></th>
               <td>
                 Mehrwertsteuer {new Big(localState.vatRate).mul(100).toNumber()}
                 %