Objects in some categories inside the Navigator can be deleted by using the Del button or with the context menu (e.g. Graphics, Bookmarks, Comments). Objects in other categories can't be deleted (e. g. Headings, Sections). I don't know if this is intended or if it is a bug. Nevertheless it would be fine, if you can delete all objects inside the Navigator. Hence it is possible to delete a lot of text with such a delete function a warning should be displayed and an acknowledgment of the user should be demanded.
Browser: Mozilla/5.0 (Windows; U; Windows NT 5.1; de; rv:220.127.116.11) Gecko/20110920 Firefox/3.6.23
Thanks for bugreport
Please, attach small document that demonstrates this problem
PS: deleting sections should retain text inside of it. Contents of section just appears outside of section and section itself disappears.
Created attachment 62096 [details]
Open text document with LO and follow the instruction inside the document.
Thanks for attachment
Problem with undoing bookmarks resembles this: Bug 44131, but creating separate bug for this problem is very welcomed.
Deleting Headings: reproducible.
IMHO expected that users will double click headers in Navigator and solve problem now in text, not in Navigator.
Deleting Sections: reproducible.
to remove section, do right mouse click->Edti->Remove.
IMHO deleting sections immediately from Navigator makes sense
Changing to Enhacement
Undoing of deletion a bookmark:
In bug 51741 is described, that a deletion of a bookmark is not seen as a modification of a document. When that bug will be corrected, I expect that it should be possible to undo a deletion of a bookmark.
It's still not possible to delete objects in several Navigator cathegories.