Allow to distinguish default button in overlay dialogs

[mlapis]

Hello,

it would be nice and also beneficial to have a possibility to distinguish default button in overlay dialogs and allow using ENTER to press it without using a mouse click (just only using keyboard). Today, all buttons have the same appearance and ENTER does not work. This would work hand in hand together with ESC functionality and allow very quick movement through dialogs without mouse clicking.

The result can be like the following example: https://postimg.org/image/g0vzla2tr

[Silent3]

I'm surprised no one else has commented on this until now. I second the motion. Having the Enter/Return key be equivalent to clicking on a default button, a default button that is differently styled, would be much appreciated.

[bsvancara]

I am also surprised that a default button is a missing feature.
I believe it is a fundamental thing.