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Description of problem:
the about dialog in evolution looks and feels very different from the standard gnome dialog. 

Version-Release number of selected component (if applicable):
evolution-3.28.5-6.el8.x86_64

How reproducible:
always

Steps to Reproduce:
1. start evolution
2. open the about dialog
3.

Actual results:
- about section with credits and close button
- no way to return from credits section to about section
- link to Evolution Website

Expected results:
standard gnome dialog

Additional info:
https://developer.gnome.org/gtk3/stable/GtkAboutDialog.html but for 3.28

Thanks for a bug report. Evolution uses the GtkAboutDialog [1], the way it looks is all up to the gtk+ itself. The gtk3 version in RHEL 8 is currently 3.22.30, thus the help page is
https://developer.gnome.org/gtk3/3.22/GtkAboutDialog.html
and it shows quite the same image as that for the 'stable' documentation, as far as I can tell.

Evolution doesn't use header bars [2], which makes the window look differently.

> no way to return from credits section to about section

That works fine for me, when I press the Credits button it lefts pushed down. Pressing it again hides the credits part. Again, it's how gtk+ does that, not Evolution.

> link to Evolution Website

The only thing I can change is the label of the link to the website, to rename it from "Evolution Website" to simple "Website", but as we found elsewhere there's no real standard around this and, in case of Evolution, it's a localized string. I believe it doesn't worth it to involve the RHEL translators to translate the new string. I changed it upstream [3] at least (for 3.33.4+), thus it gets to RHEL in some future release/rebase.

[1] https://gitlab.gnome.org/GNOME/evolution/blob/gnome-3-28/src/shell/e-shell-utils.c#L423
[2] https://gitlab.gnome.org/GNOME/evolution/blob/gnome-3-28/src/shell/e-shell.c#L1726
[3] https://gitlab.gnome.org/GNOME/evolution/commit/f4185d03e1

thanks for the [3], Milan :)