bug#68235: 29.1.90; Switching tabs stops following process output in selected window

[martin rudalics]

> Actually one hook 'pre-current-window-configuration-functions' should be
> sufficient.  Like there is only 'isearch-push-state-function' that can
> be used to save a lambda that can restore the current window-start, then
> on going back this lambda is called and restores the previous window-start.

IIUC we have to move some point to some position somewhere in
'set-window-configuration'.  Who would trigger that?  Calling a function
from within 'set-window-configuration' seems hairy to me.

martin