@jane-n I totally agree it'd be nice to edit the menu and have those buttons appear when Vivaldi is narrow enough even when in tablet mode. I'd definitely prefer that. Personally, I'd love those configured buttons even in full-screen tablet mode, but maybe that's just me.
I only meant that if it's by design for the edited buttons to never appear in tablet mode at any width, then perhaps it shouldn't show the option to edit in tablet mode at any width either. But that's not what happens today: in tablet mode, even though the buttons never appear, the option to edit does appear when Vivaldi is narrow enough. Hope that makes more sense!