[Media controller] Use PlasmaExtras.Representation

applets/mediacontroller/contents/ui/ExpandedRepresentation.qml

@@ -29,7 +29,7 @@ import org.kde.kcoreaddons 1.0 as KCoreAddons
 import org.kde.kirigami 2.4 as Kirigami
 import QtGraphicalEffects 1.0
 
-PlasmaComponents3.Page {
+PlasmaExtras.Representation {
     id: expandedRepresentation
 
     Layout.minimumWidth: PlasmaCore.Units.gridUnit * 14
@@ -37,6 +37,8 @@ PlasmaComponents3.Page {
     Layout.preferredWidth: Layout.minimumWidth * 1.5
     Layout.preferredHeight: Layout.minimumHeight * 1.5
 
+    collapseMarginsHint: true
+
     readonly property int controlSize: PlasmaCore.Units.iconSizes.medium
 
     property double position: mpris2Source.currentData.Position || 0