fix(datepicker): Set vertical align on datepicker tables

[jshoudy11]

fixes #7111

[ThomasBurleson]

@conniew - is this ready for me to merge? LGTM

[jshoudy11]

@ThomasBurleson I don't think this is a breaking change. It doesn't change the appearance on material.angularjs.org, only for those that have vertical-align:baseline set explicitly.

[conniew]

The code LGTM, I trust you and Jake more with the process of merging, though.

[jshoudy11]

@ThomasBurleson do you want me to push this through the command line from jshoudy11:feat/datepicker_align to angular:feat/datepicker_align and then create a PR to pull it into master separately? Or should that all be done from this PR?

[ThomasBurleson]

@jshoudy11, @conniew - I was only going to merge this into master and minor branches.
@conniew - if the UI can possibly change as a result of the PR, we are call it a breaking change. And if the API changes, we also call it a breaking change (traditional).

[jshoudy11]

@ThomasBurleson Okay. Should be ready for merge then.