Fixes #3941 - v2win/v2net: UICatalog crash - Fixes warnings

[tig]

Fixes

• Fixes v2win/v2net: UICatalog full benchmark suite crashes in Dialogs scenario #3941
• Fixes warnings caused by Transparent PR
• Fixes warnings in other places

Proposed Changes/Todos

• See if adjusting the UI Catalog demo key pacing will fix

Pull Request checklist:

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[tig]

@tznind - I wonder if this is why we have sporadic test failures in CI, there is All_Scenarios_Benchmark and a stack overflow might cause the behaviour we see.

FWIW, I think I saw one failure after I implemented #3946. So I'm not declaring victory on #3930 yet.

But I think this does fix #3941

[tig]

FWIW, #3930 is not related to this; still happens with the benchmark scenario test disabled.