Focused window does not have focus when restarting

[petemill]

note: I noticed this, and made a fix, when testing Buffer Windows in #12438, but it is a regression from 0.20.x or before. Assigning to same milestone as buffer windows, but can be moved if the fix shouldn't land in that milestone.

Description

This is caused by two reasons:

• An incorrect redux action name is preventing 'focusTime' from getting saved to windowState accurately
• We now open windows asynchronously, so window's could render and be shown, at different times and not in the order the windows were asked to be created

Test plan / Steps to Reproduce

1. Open several windows with tabs
2. Place the windows at different coordinates with different sizes
3. Focus the windows in a specific order
4. Quit Brave
5. Start Brave

Actual result:

• The last-focused window does not always have focus.
• The stacking order is not remembered.

Expected result:
The windows are layered in the same stacking order as they were previously. The last window to have focus, has focus after restart

[LaurenWags]

reproduced the stacking order not being remembered.

This is how the windows were when closing 0.21.11:

This is how they were upon opening:

[petemill]

This is a good candidate to be bumped to the next release to look at perfecting it, or moving to triage, since it works more of the time now (it will never be perfect as some timing is out of our control, though the above scenario should probably work)