bug#33654: 27.0.50; No record of init file errors printed in *Messages*

[martin rudalics]

> Maybe we could add something to window-setup-hook when we have delayed
> warnings to display after startup?

I'd leave 'window-setup-hook' alone and do something similar to the
attached patch.  We could also try "(reusable-frames . visible)" there
which should put any frame already showing *Warnings* on top of the
others (at least here it does that), but not all window managers out
there might comply.

Here I neither use desktop nor multiple frames.  So please test the
patch with the originally posted desktop saved multiple frames setup.

Thanks, martin

startup.el.diff
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