Yep, and of course I've long since added that myself too
Similar, not on page context, but on the Go-button which has the traditional menu for such stuff (menu "_Go_Clipboard")
Called it "Paste and Go in new page", since there is already a native command for "Paste and Go".
But in real life it turned out I still just paste into urlbar and just hit Return...
Am wondering too that the urlbar-context menu might be called... It seems that most people are used to look for a menu rather there, not on the Go-button. The long bar is also quicker to hit than a little button. And somehow KM is just a bit different than people are used from other browsers, so they keep missing that stuff
Even myself was missing for years the "Duplicate Tab" command known from old IE, until finally reading somewhere in the Forum it does exist and just has another name: "Open in new page" - Oops! Never had noticed...
And on the tab-context it's not either. KM has so many functions, but such little differences to other browsers get them overlooked sometimes, that's a pity.