[AutoComplete] Migrate to use popover

[alitaheri]

I'm still figuring out how the auto-complete works and why it uses instance properties instead of state.
Closes #2632 and #2595
@oliviertassinari Please check this out. It is still buggy, and sometimes forcefully holds the focus. I know it's coming from the callback passed to onBlur event of TextField, without it, it looks ugly. With it sometimes it won't leave the focus. play with the component for a while and you might be able to reproduce it (for me it's fairly easy)

@yongxu could use your help again, if you've got the time 😁

[alitaheri]

@oliviertassinari @newoga This is more important that theme. we need this for 0.14.0 😁 Those can wait :P

[oliviertassinari]

Sure, the theme question should really be answered but can wait a bit (it can have a lot of good impacts).

I have noticed one change, the width of the Popover is different.
https://github.com/callemall/material-ui/blob/master/src/DropDownMenu/DropDownMenu.jsx#L325 could help.

[alitaheri]

check again please 😁

[oliviertassinari]

@subjectix Yes, that's better 👍. I haven't any other bugs.

[alitaheri]

@oliviertassinari Thanks for reviewing this 😁 Can I merge after a squash? ^_^

[newoga]

@subjectix @oliviertassinari I agree that the theme stuff can wait. Sorry for getting caught up in it. I haven't reviewed this (but I don't think I need to). The changes seem sound and I'm happy with it. 😄

[alitaheri]

@newoga Thanks ^.^ I myself have some issues with it, but they relate to how popover works. We should improve the API and possibly the behavior. It's a very great component, but it can be improved a lot.

[newoga]

I agree! @yongxu's initial PR was the first time I contributed (via commenting) to this project. So I also have him to thank for getting me involved. 😄

[newoga]

I'm hoping when I get around #2416 I can also incorporate AutoComplete behavior from this.

[alitaheri]

@newoga Yeah #2416 is a great change. really awesome 👍 Really looking forward to see it come to reality 👍 👍

[oliviertassinari]

Yes, let's merge this. Sometimes we have to take risks and break stuff to move fast.
@subjectix Thanks

[oliviertassinari]

was the first time I contributed

@newoga We are glad you are here 👍

[alitaheri]

@oliviertassinari Thanks, sorry my code was a bit sloppy. We should fix a lot of stuff in 0.14.1 😁

[alitaheri]

@newoga We are glad you are here 👍

Yeah you've been a great help so far 👍 👍

[newoga]

Thanks guys, I'm glad to be here! You both (and many others I've seen while perusing the issues as I often do in many projects) have been great examples of how to build an inviting community 👏 .

[alitaheri]

@newoga Glad you like this community, I love it myself ❤️ ❤️