When a project is set to use a fixed frame rate via the Project Settings it is uncapped when played in editor.

Found in 4.24 Preview 2 CL#10091930
Reproduced in 4.25 Main CL#10298106

Steps to Reproduce

1. Create a new project.
2. Enable "Used Fixed Frame Rate" in Project Settings.
3. Show the FPS in the viewport.
4. Play in Editor.

Results: The frame rate is uncapped.

Expected: The frame rate is locked at at 30.

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ComponentUE - Rendering Architecture - RHI
Affects Versions4.244.25
Target Fix4.24
Fix Commit10341305
Main Commit10341323
Release Commit10341305
CreatedNov 19, 2019
ResolvedNov 21, 2019
UpdatedJan 25, 2021
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