Feature request: add a new option "Open tabs" for the list of streams

[cipricus]

At the present we have "This tab", "All tabs" (open or not), and "Previous session". But if some tabs are closed the streams they contained are still listed if "All tabs" is selected, because this option is in fact listing all streams found in the present setting, not just all open tabs, which to me seemed the expected behavior. (That's why an option called "This session" is not missing, unlike what I thought at first contact with these options when I saw "Previous sessions" but nothing about present session.)

No matter the name of the "All tabs" option, a new option for a list of streams found in all open tabs seems needed here (and I think that list would be at least as useful as the one that shows hits from closed tabs and from closed sessions).

[54ac]

I'll consider implementing this at some point.