[FIX] Broken behavior of webview back arrow

[arielj]

After this #3426, the back arrow for the webview was actually broken to process the webview's history.

This PR fixes that by adding the webviewGoBack dependency to useCallback so the function gets updated (honestly I don't see the point of using useCallback here, seems like an over-optimization).

Without this fix, the back arrow always takes you to the last heroic screen instead of navigating back inside the webview

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Use the following Checklist if you have changed something on the Backend or Frontend:

• Tested the feature and it's working on a current and clean install.
• Tested the main App features and they are still working on a current and clean install. (Login, Install, Play, Uninstall, Move games, etc.)
• Created / Updated Tests (If necessary)
• Created / Updated documentation (If necessary)