When fullscreen (on macOS), move the nav controls left

[bsclifton]

Test plan

#8514 (comment)

1. Launch Brave on macOS
2. Click the green button in the top left to trigger full screen mode
3. Notice the back/forward arrows move after the traffic lights disappear
4. Move mouse into top left corner, hit green button to un-trigger full screen mode
5. Notice traffic lights appear again and back/forward arrows pop to the right again

Original issue description

Screenshot of user fullscreen:

Notice in the top left there is a blank area where the traffic lights used to be (red / yellow / green buttons). This area should disappear

[freebrowser1]

But the top-left stoplight buttons do appear in the titlebar.

Additionally, this title bar and tabs bar should disappear as well to become really 'full screen' (and obviously reappear when mouse is moved to top).

[luixxiul]

But the top-left stoplight buttons do appear in the titlebar.

Because the window is not in the fullscreen mode, which is different from the maxmized window.

[kumarrishav]

I would like to a shot to this one :)

[bsclifton]

@kumarrishav go for it 😄 Let me know if you have any questions

(I assigned myself so that we know somebody is working on it- I can help you review / test)