bug#32850: 27.0.50; window-swap-states doesn't swap window prev/next-buffers

[Juri Linkov]

>> In case you're interested, here's is a working solution
>> that saves window configurations to the desktop file:
>> https://gitlab.com/link0ff/emacs-wincows/commit/e2d1c132
>
> It would be nice to combine wincows.el with frame-tabs.el, somehow.

Since now finally we have persistence for window configurations,
I'm going to revive the x-tabs branch.  The package wincows.el
was needed for testing what will be the internal functionality
in the x-tabs branch.  And for the user interface it could use
what you implemented for displaying tabs in side windows in frame-tabs.el.
Would you allow using your code from frame-tabs.el in the x-tabs branch?