RFE: indicate that "Undo close group" is about to expire

When closing a group with the X button there is an option to undo this for a few seconds. That's very handy and important. Sometimes I close many groups at once, but especially when I am in single-view sometimes previously closed groups' "Undo close group" option expires and the position of the tab group changes. When I click the X for another group at the wrong moment, it might be closed inadvertently. Not a really big deal since I can restore it easily, but still an avoidable nuisance if the tab group's background turned to a different colour 1 second before the option expires or something like that.

True. In fact, it's supposed to not expire (disappear) if you move the mouse over it; I'll have to confirm that is actually happening. But in single view it's probably better if no groups expire at all if you're interacting with the top group selectors.

In single view the bar should only be updated (expires) after exiting the tab view. That's more handy. Other thing, this "undo close group" could be better. Something like this:

+1