bug#69993: Wrap window buffers while cycling

[Juri Linkov]

>> So no problem, tab-line.el is the right place since later I could
>> also implement drag'n'drop of tabs to allow manually changing
>> the order of buffers in the window buffers list.
>
> Your are throwing out the child with the bathwater.  I think your
> earlier patches for 'switch-to-prev-buffer' and 'switch-to-next-buffer'
> were good.  Just the doc of the option was too tab-line specific.

I don't know, this whole feature was intended to be tab-line specific,
since the window prev/next-buffers are visualized by the tab-line.