Function: todo-top-priorities

List top priorities for each category.

Number of entries for each category is given by NOF-PRIORITIES which
defaults to `todo-show-priorities'.

If CATEGORY-PR-PAGE is non-nil, a page separator '^L' is inserted
between each category.
INTERACTIVE should be non-nil if this function is called interactively.

(fn &optional NOF-PRIORITIES CATEGORY-PR-PAGE INTERACTIVE)