This configuration is not relevant anymore, as GNOME 2 has been removed from most distributions. It could still apply to stuff like MATE and Cinnamon, but let's let it rest here for now.

The Gnome exception

When I don't want to go through the hassle of doing a special configuration, since I don't have time to play around with all this, I just used the default Gnome environment, with a few tweaks:

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