Radios: add support for images
Summary:
Album images where disabled for radios. This patch adds support for images in the radio view. A field has been added to EditableMetaData to allow the user to choose the image he wants for a radio. It can be a local file or an url.
Linked to: T7567
Reviewers: Elisa, mgallien, ngraham, astippich
Reviewed By: Elisa, astippich
Subscribers: ndavis, astippich, ngraham, mgallien
Differential Revision: https://phabricator.kde.org/D23859