Fixes #2913: Closing an inactive tab should not change the active tab

[willy-b]

• Used Github auto-closing keywords in the commit message.

[bsclifton]

I pulled this code down locally and it does fix the case outlined in the issue... However, I was able to reproduce a scenario where it doesn't work though. Can you please help look into why?

Steps

1. Open https://www.wikipedia.org/ in tab 1
2. Follow any link on that page, using middle click to create a new tab (but not sending focus there). This is tab 2
3. Open a new tab, tab 3, by clicking the plus and then navigating to whatever site you like
4. Set the active focus to tab 1
5. Close tab 3
6. Focus is now on tab 2 😦

NOTE: in my example, I had two pinned tabs. I tried unpinning them and the behavior did not change (it still failed, per the above steps)

[willy-b]

Thanks @bsclifton for catching that.

I just pushed another commit which should fix the case you pointed out, and the separate case where the 3rd tab is the child of the 2nd tab.

[bsclifton]

Works great! Thanks for taking the time to dig in and get the parentFrameKey fix in there 😄