Bulk edit does not recognize post format settings

[andrewspittle]

The bulk edit tool for posts does not recognize post format settings for a theme. Instead of displaying those the active theme supports it lists all formats.

To reproduce:

1. Set Twenty Eleven as your active theme
2. Go to the Posts tab
3. Select multiple posts
4. Select "Bulk Edit" and click "Apply"
5. Select the "Post Format" dropdown

All post formats will be listed, even though Twenty Eleven only supports a limited set of formats.

It would be better for the dropdown to only list those formats which your current theme supports. This prevents a user from setting their post to a format that a theme does not support.

Introduced in #18083.

In [20194]:

Hide unsupported post formats from bulk edit. fixes #20245.

In [20195]:

Change 'Post Format' bulk/quick edit label to 'Format'. Consistent with the UI and prevents word wrapping. Tidy logic. see #20245.