style(transaction-history): adjust button icon size and spacing

frontend/src/app/feature/transaction-history/transaction-history.component.html

@@ -1,13 +1,13 @@
 <div *ngIf="isOpen" [@fadeInOut] class="modal-bg" style="z-index: 1000; position: fixed;">
   <div class="modal-card" [@cardAnimation]>
     <button type="button" (click)="closeDialog()" class="absolute top-2 right-2 text-text-secondary">
-      <svg xmlns="http://www.w3.org/2000/svg" width="1em" height="1em" viewBox="0 0 24 24">
+      <svg xmlns="http://www.w3.org/2000/svg" width="2em" height="2em" viewBox="0 0 24 24">
         <path fill="none" stroke="currentColor" stroke-linecap="round" stroke-linejoin="round" stroke-width="2"
               d="M18 6L6 18M6 6l12 12" />
       </svg>
     </button>
     <h2 class="modal-heading">Transaktionen</h2>
-    <p class="py-2 text-text-secondary mb-4">Hier siehst du alle vergangenen Einzahlungen</p>
+    <p class="py-1 text-text-secondary mb-4">Hier siehst du alle vergangenen Einzahlungen</p>
     @for (transaction of (transactionData$ | async)?.transactions; track null) {
       <div class="flex justify-between items-center mb-4">
         <div>