DOM's plugin manger aesthetic adjustments.

2000-03-25  Jody Goldberg <jgoldberg@home.com>

	* src/sheet.c (sheet_{col,row}_set_size_pts) : Set the update flags.

	* src/workbook.c : Add undo/redo elements.

2000-03-25  Jody Goldberg <jgoldberg@home.com>

	For Dom Lachowicz <cinamod@hotmail.com>

	* src/plugin.[ch] (plugin_data_get_size,
	  plugin_data_last_modified) : New functions.
	(plugin_load): updated

	* src/dialogs/dialog-plugin-manager.c
	(dialog-plugin-manager-impl, refresh-right-frame): updated.

	* src/dialogs/plugin-manager.glade,
	  src/dialogs/plugin-manager.glade.h
	  New layout, enabled word-wrap in description,
	  Other aesthetic changes