If I remember correctly, prior to v3.13 there was an "at a glance" screen within diplomacy screen where we can look up every civ's attitude to every other civ. This apparently have been removed in v3.13. Am I mistaken?

No. They removed it as part of v3.13 - they claimed it was too ugly. There are some mods that put it back ... The BUG Mod being one (see sig).

I run 3.13. The Glance screen is still present, though I very rarely look at it.

No. They removed it as part of v3.13 - they claimed it was too ugly. There are some mods that put it back ... The BUG Mod being one (see sig).

this is ridiculous. I do use it to check out the "international environment"

I run 3.13. The Glance screen is still present, though I very rarely look at it.

Where is it now? It was on the F4 screen, but after 3.13 I don't see it.