ui: Initialize sensitivity of trancoding checkboxes
ui: Initialize sensitivity of trancoding checkboxes

Initialize sensitivity of trancoding checkboxes to the same value
as that of "Transcoding Support" checkbox.

Tarnyko/rygel,GNOME/rygel,Tarnyko/rygel,GNOME/rygel,Pelagicore/Media-Manager-Rygel-patched,GNOME/rygel,Pelagicore/Media-Manager-Rygel-patched,Pelagicore/Media-Manager-Rygel-patched,jku/rygel,jku/rygel,luisbg/rygel