bug#3419: 23.0.94; calc, calendar and temp-buffer-resize-mode

[martin rudalics]

> `display-buffer-alist' can't undo splitting done outside of the
> `display-buffer' call.

We have to identify all cases where this happens and replace them
appropriately.

> When splitting is done in a display action,
> user can easily override it.  For instance, a new action
> `display-buffer-pop-up-window-below' I posted in bug#9873
> does splitting that users can override.

We have to make sure that it doesn't create too small windows.  Binding
`split-height-threshold' to zero might be too strong in some cases and
ignores user preferences.

martin