add_image_size needs a $label

[wycks]

add_image_size() does not have a $label parameter, this effects both localization but more importantly limits the image_size_names_choose filter.

The is when you try to add an image to a post and you can select sizes via the radio buttons.

Default sizes have labels like: 'large' => ('Large')

the image_size_names_choose filter is a great new filter that allows you to alter those radio buttons, but requires you to hardcore the array values for add_image_size() since it does not have a label (unless I'm missing something).

Reference code: ​https://gist.github.com/2668630

Related: http://core.trac.wordpress.org/ticket/19990