Update header styling and improve avatar image attributes

Adjusted the header height and title text for clarity and consistency in the bans page. Also streamlined avatar image attributes by removing unnecessary units for better HTML standards compliance.

frontend/src/app/bans/history/history.component.html

@@ -21,8 +21,8 @@
       <tr *ngFor="let entry of history">
         <td class="historyType">{{ getType(entry) }}</td>
         <td class="historyPlayer">
-          <img class="avatar" ngSrc="https://cravatar.eu/avatar/cba80e47fcbc407aa5ad37a933b7fe30/25" width="25px"
-               height="25px" alt="">
+          <img class="avatar" ngSrc="https://cravatar.eu/avatar/cba80e47fcbc407aa5ad37a933b7fe30/25" width="25"
+               height="25" alt="">
           {{ entry.username }}
         </td>
         <td class="historyPlayer">{{ entry.punishedBy }}</td>