Split terminals get resized after focus is lost

[Vulcalien]

Describe the bug
After splitting a terminal, if the focus is lost on the containing paned, the terminal resizes.
I think this is the same bug I was talking about in #553

To Reproduce

• Split a terminal into two (horizontally or vertically)
• Split again (either way)
• Notice that the terminals get resized by a few pixels

Alternative:

• Split a terminal into two
• Switch to another window, so that Terminator loses focus
• Notice that the terminals get resized by a few pixels

Expected behavior
I don't see any reason for this to happen

Desktop

• OS or Linux Distribution: Debian
• Version: bookworm (testing)
• Display Technology: X11

Edit: it might have something to do with the titlebar. In my profile, I don't have it and the issue occurs. When I put it on, I don't think the bug is there.

[mattrose]

Did the pr #553 fix this? If so, can you close?

[Vulcalien]

Did the pr #553 fix this?

I can still reproduce the bug after merging the PR. I remember trying to figure out why that was happening, but finding nothing.
It's definitely an undesired behavior.

It's as if the "Paned"s added some padding. Or maybe the code that splits the terminal somehow calculates the size inaccurately.