SS4: Missing chosen-sprite.png in TagField.css

[axllent]

TagField.css refers to url('../../framework/admin/thirdparty/chosen/chosen/chosen-sprite.png') which, although still exists in the admin, is no longer available via /resources/ nor via framework.

[zanderwar]

Confirmed, same issue

[tractorcow]

Chosen has been shifted to admin now (not framework), but the image is only in the non-exposed admin/client/src/images folder.

We should move that to dist and make sure it's used by chosen dropdown in the CMS.

[tractorcow]

Logged on admin module at silverstripe/silverstripe-admin#339

[flamerohr]

Pull request made which makes chosen-sprite.png available in admin's dist folder :)
Reference on here will need to be updated to match

[tractorcow]

Ok, it's public now silverstripe/silverstripe-admin#353

Need to update this module with the new path.

[robbieaverill]

I'm going to close this since we're going to be replacing the tag field rendering with a React based equivalent which will be controlled by the admin module in terms of styling/design. Doing that would make this issue obsolete. Since that issue is in progress at #110, doing this would be wasted effort.