bug#12253: Restore window start position

[Juri Linkov]

>> (I guess using `set-window-point' instead of `goto-char'
>> is not applicable to Info):
>
> Why not?

Usually Info widens the Info buffer, moves point using `goto-char' and
finally narrows the buffer to the current node.  There is no way to use
`set-window-point' in this workflow.  Other places (that move point
after narrowing) could use the same function `goto-char' for consistency.