Fix framerate limit not saving

[RumBugen]

Pull Request

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Summary

This PR fixes the video settings menu so the "Framerate Limit (game)" value is loaded from the saved render settings and written back when applying changes. This resolves a bug where the slider always reverted to 0 after reopening the settings.

Motivation & Context

The setting was exposed in the UI, but it was never actually connected to the persisted render setting. The menu code still had commented-out TODO lines referring to a non existent property, so the slider defaulted to 0 on reopen and user changes were never saved. I ran git blame and found the commit 38b5f79, which commented it out. It was probably forgotten to implement before the commit was made.

Fixes: #10361

Implementation Details

Replaced the commented out FrameRateLimit references in VideoSettings.razor with the actual persisted render setting.
If I missed anything, let me know :9

Screenshots / Videos (if applicable)

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Checklist

• Code follows existing style and conventions
• No unnecessary formatting or unrelated changes
• Public APIs are documented (if applicable)
• Unit tests added where applicable and all passing
• I’m okay with this PR being rejected or requested to change 🙂