Post format information is displayed in the Edit Posts table even when not enabled by theme

[westi]

_post_states doesn't check to see if the current theme supports post formats before outputting the format.

The data shouldn't be shown if the current theme isn't using it and you can't edit it.

[westi]

(In [16645]) Don't show the Post Format if the current theme doesn't support them. Fixes #15625.

[nacin]

Should be reverted, per IRC discussion. This is still relevant data, much like a post format that was supported by the old theme and added to posts, but not supported by the new theme.

[westi]

Now that we don't store "default" in the db the confusion this caused for XML-RPC posts re #15629 will not occur so it should be fine to revert

Previously with default in the db every xmlrpc post would be marked as default

[nacin]

(In [16964]) Revert [16645]. see #15625.