`MdDatepickerToggle` not working well after disable its input associated (template driven forms)

[rafaelss95]

Bug, feature request, or proposal:

Bug.

What is the expected behavior?

md-datepicker-toggle should respect the input state.

What is the current behavior?

Described below.

What are the steps to reproduce?

1 - Click "Enable/disable" input... now the input is disabled;
2 - Press the md-datepicker-toggle (yes it's still enabled)... nothing will happen and after you click it'll be disabled;
3 - Click "Enable/disable" input... now the input is enabled;
4 - md-datepicker-toggle button is disabled now always.

Providing a Plunker (or similar) is the best way to get the team to see your issue.
https://plnkr.co/edit/gpldSaRYwQDRKIHMOsHu?p=preview

Related to #6973.

[crisbeto]

Will be resolved by #6964.

[rafaelss95]

Thanks (it was fast) :)

[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.}