Sidebar of Notes
Feature request: In Opera there were notes as pieces of texts which could be easily pasted (doubleclicked) anywhere to text fields. Fine for editing Wikipedia, for having some templates, for simple notes. In Vivaldi there are these pieces connected with url and click opens this url - it seems to be some kind of duplicate of bookmarks. If I delete url, it does nothing. Please, restore possibility to paste text on every page.
The feature you are asking for is incomplete, and in process.