Fix typ in toolbar init.
Fix typo in sheet deletion.

2000-05-04  Jody Goldberg <jgoldberg@home.com>

	* src/workbook.c : Fix typo that was calling undo for redo toolbar.
	({redo,undo}_cmd) : Use workbook_finish_editing directly.
	(cb_auto{function,sum}) : If we are already editing do not start.
	  When the wizard is in place bring it up.
	(workbook_start_editing_at_cursor) : Make the '=' insensitive while
	  editing.
	(workbook_finish_editing) : Make the '=' sensitive.
	(sheet_action_delete_sheet) : Fix typo and rename parm
	  'current_sheet' -> 'sheet' to avoid confision with
	  workbook->current_sheet.