calendar: doesn't support tabbing out of it when used standalone

[stefan--]

Actual Behavior:

• When using md-calendar the tabindex breaks
• A user should be able to tab through the inputs next to a md-calendar

CodePen (or steps to reproduce the issue): *

• https://jsfiddle.net/08sd1hs1/1/
• With a md-calendar tabbing is broken. If you remove the directive, it works.

Angular Versions: *

• Angular Version: https://rawgit.com/angular/bower-material/master/angular-material.js
• Angular Material Version: https://cdnjs.cloudflare.com/ajax/libs/angular.js/1.4.6/angular.js

Additional Information:

• Browser Type: * Chrome & Firefox
• Browser Version: * Version 53.0.2785.116 (64-bit) & 47.0.1
• OS: * Mac
• Stack Traces: none

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[crisbeto]

This should be fixed when either #9746 or #9641 get merged.

[Splaktar]

#9746 was merged into 1.1.2, but I tested with the jsfiddle above (which uses master) on 1.1.6 and the issue still occurs.