* gladeui/glade-editor-property.c: changed glade_eprop_text_show_i18n_dialog()
	  to call a command to change the i18n metadata on the label property
	  instead of changing it directly.  This allows the change to be
	  un-/re-done (bug 352454).

	* gladeui/glade-command.[ch]: added the glade_command_set_i18n command.


svn path=/trunk/; revision=1071