Make browse_sort_links default wrapper tags easier

[patrickmj]

Looks like the second param to browse_sort_links is an empty array, and the function splices in some defaults:

$defaults = array( 'link_tag' => 'li', 'list_tag' => 'ul', 'link_attr' => '', 'list_attr' => '' );

$sortlistWrappers = array_merge($defaults, $wrapperTags);

`

But in practice, it looks like these are more working defaults in admin side:

array('link_tag' => 'th scope="col"', 'list_tag' => '')

At least on admin side, maybe making those the defaults would be easier for devs?

I'm not sure of consequences on public side yet.

[jeremyboggs]

Noticed that $defaults['link_attr']and $defaults['list_attr'] aren't used anywhere in the function, unless I'm overlooking it.

I think the attributes for these various tags could be added much easier using the existing, and quite handy, tag_attributes function used in other functions.

This would also be another great function to use a partial for outputting the HTML, one that would take the partial as an argument so you could the same function in multiple places but output the HTML differently.

[jimsafley]

ensure that all those parameters do something, and remove them if they don't

[zerocrates]

Everything appears to be used, the $defaults are merged into $sortlistWrappers