Fixs lots of usability details.

2000-04-20  Jody Goldberg <jgoldberg@home.com>

	* src/dialogs/dialog-cell-format.c : Use the edit_pos as the example
	  not the top left corner.

	* src/functions/fn-stat.c (gnumeric_ftest) : Use eval_pos_cellref
	  to help localize the strangeness.
	(gnumeric_ttest) : Ditto.

	* src/xml-io.c (xml_write_cell_and_position) : If this is an array
	  expression and we are the top left then add attributes to indicate
	  size of array.  Ignore the rest of the array.
	(xml_not_used_old_array_spec) : New routinr to handle the old array format.
	(xml_cell_set_array_expr) : store an array.
	(xml_read_cell) : Handle the old and the new array formats.

	* src/workbook.c (workbook_close_if_user_permits) : Accept input
	  first.
	(wb_edit_key_pressed) : Handle array formulas here.
	(workbook_detach_sheet) : Do not recalc all if we are exiting.
	(workbook_start_editing_at_cursor) : When we start editing an
	  array formula display just the formula not ...