Is there a way to change the power button behavior? Put it back as it was before Mavericks?

It's the first timeI ever post anything here, so please forgive any mistake on style, language, netiquette, etc.

The thing is I accidentally press the power button all the time, and I prefer a pop up dialog rather than taking my Mac to sleep...

And there is this bug, that when I press it back, it doesn't wake every time, so I had to force shut down way four times in the last few days, losing whatever I had going on and not saved.

Until today it only happened when using full screen Steam games, but just a few minuets ago, it happened just browsing some forums in a Safari window.

So I really would like to be able to change this button beahvior. Despite the bug shuld be fixed...

Thanks!