Retain existing ripples when button state changes to disabled

[willshowell]

Bug, feature request, or proposal:

Bug

Expected behavior

When clicking on a button that will immediately become disabled, the ripple should remain until it fades out.

Current behavior

The ripple is immediately destroyed when the button state changes to disabled.

What are the steps to reproduce?

http://plnkr.co/edit/otcf7ejUS9GTY1s3s3v2?p=preview

Is there anything else we should know?

Happy to open a PR if this is desired behavior

[devversion]

Yep. We should remove the *ngIf and just use the mdRippleDisabled binding.

Let me know if you want to put a PR together. Otherwise I can take care of it :)

[willshowell]

@devversion up at #4372!

[angular-automatic-lock-bot]

This issue has been automatically locked due to inactivity.
Please file a new issue if you are encountering a similar or related problem.

Read more about our automatic conversation locking policy.

_{This action has been performed automatically by a bot.}