Acording to the konsole handbook section 2.1.4 Bookmarks Men https://docs.kde.org/stable5/en/applications/konsole/konsole.pdf There should be and 'Edit Bookmarks' option. I cannot see it. Maybe a regression? konsole 17.12.1
Do you have keditbookmarks installed? For ubuntu it is called keditbookmarks I believe there were recent changes to keditbookmarks such that the Edit menu doesn't appear unless installed. I"d have to double-check if that doesn't fix your issue.
OK so I removed keditbookmarks and the Edit button is no longer there in Konsole. This works as expected - I'll update the handbook.
Git commit 8254dd07d967925009c321315474edaf0b711468 by Kurt Hindenburg. Committed on 11/04/2018 at 13:16. Pushed by hindenburg into branch 'master'. Add note about Edit Bookmarks menu requires keditbookmark program M +2 -2 doc/manual/index.docbook https://commits.kde.org/konsole/8254dd07d967925009c321315474edaf0b711468