* Add `SohModalWindow` and `SohModal`. Runs as window, always "visible", but not drawing if no popups are registered.
Adds error catching for save file corruption (malformed json) that renames the file in question to prevent future loading issues and uses `SohModalWindow` to inform the user of the error.
* Apply suggestions from code review
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Co-authored-by: briaguya <70942617+briaguya-ai@users.noreply.github.com>
briaguya