media-controls: ensure the related items appear in the correct order
media-controls: ensure the related items appear in the correct order

Disconnect and re-connect the MexProxy object from the view model when a
new model is set to make sure the items in the related content area appear
in the same order that they are in the model. This is necessary because
MexContentProxy cannot re-order items in the container.

media-explorer/media-explorer,media-explorer/media-explorer,media-explorer/media-explorer,media-explorer/media-explorer