chore: increase token list overscan (#38498)

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## **Description**

Increase the virtualize token list overscan

Interim workaround until a long term solution is ready to handle the
dynamic header with no balance / carousel

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## **Changelog**

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## **Related issues**

Fixes: https://consensyssoftware.atlassian.net/browse/CEUX-754

## **Manual testing steps**

1. Home > Token list
2. Scroll

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### **After**

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## **Pre-merge author checklist**

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<!-- CURSOR_SUMMARY -->
---

> [!NOTE]
> Increase virtualized token list overscan from 5 to 10 in the token
list component to render more items ahead while scrolling.
> 
> - **UI**
> - **Token list virtualization**: Increase `overscan` from `5` to `10`
in `ui/components/app/assets/token-list/token-list.tsx`.
> 
> <sup>Written by [Cursor
Bugbot](https://cursor.com/dashboard?tab=bugbot) for commit
73afbe8. This will update automatically
on new commits. Configure
[here](https://cursor.com/dashboard?tab=bugbot).</sup>
<!-- /CURSOR_SUMMARY -->

Author: n3ps

ui/components/app/assets/token-list/token-list.tsx

@@ -159,7 +159,7 @@ function TokenList({ onTokenClick, safeChains }: TokenListProps) {
     count: sortedFilteredTokens.length,
     getScrollElement: () => scrollContainerRef?.current || null,
     estimateSize: () => ASSET_CELL_HEIGHT,
-    overscan: 5,
+    overscan: 10,
   });
 
   useEffect(() => {