The QML files are designed for sidebar-at-top (logo, step name,
progress bar) and navigation-at-bottom (Back/Cancel/Next buttons
in a horizontal row). branding.desc had them reversed (sidebar
at bottom, navigation on right), causing the entire chrome to
render in the wrong positions — sidebar at bottom with inverted
shadow and progress bar, navigation as a vertical strip on the
right side.
Changed: sidebar: qml,top | navigation: qml,bottom