bug#81406: 31.0.90; rotate-windows loses window balance when window-combination-resize is t

> I have only two dedicated windows I use daily and in a tab-bar tab that is
> "locked" from being closed (that contribution coming in Emacs 32 along with
> several other tab-bar improvements).

This (and other tab-bar improvements) is very much welcome
in Emacs 32 — this is like "Pin tab" in web browsers
(or probably "Pin tab" does too much, and it should be sufficient
to have only "Lock tab").