Add spacing between tabs with rounded corners (new design v102)

[DominicDesbiens]

Hi,

I've just enabled a new flag in Edge v102 (I use beta version), Show experimental appearance settings (edge://flags/#edge-visual-rejuv-show-settings). Ok, this new design is really inspired by Firefox and... I like it ! But...

It should have a spacing between tabs with rounded corners... It could be more clean (like Firefox)

No spacing between tabs in Edge

In Firefox :

Spacing between tabs in Firefox

[#2]

Hi, I also think that larger spacing is better, but others want to have everything together without separation.

[#3]

@A1-A1 maybe we could have an option in settings to choose to have or not this spacing. 

[#4]

Unfortunately, the project cannot take into account such details that the user can change in the settings.

[#5]

Firefox spaced tabs looks so much better! Edge should do the same.