Add radius to both scrubber outline and scrubber background for visual

consistency

osd/PlayerControl.qml

@@ -189,12 +189,20 @@ Item {
         text: playerController.player?.trackArtist
       }
       Rectangle {
-        id: scrubber
+        id: scrubberOutline
         Layout.fillWidth: true
-        Layout.preferredHeight: 8
+        Layout.preferredHeight: 12
         Layout.rightMargin: 8
-        color: blendedColors.colLayer1
+        color: blendedColors.colSecondaryContainer
         visible: playerController.player?.length > 0
+        radius: parent.height / 2
+
+        Rectangle {
+          id: scrubber
+          anchors.fill: parent
+          anchors.margins: 2
+          color: blendedColors.colLayer1
+          radius: parent.height / 2
 
           Rectangle {
             anchors.top: parent.top
@@ -216,6 +224,7 @@ Item {
             }
           }
         }
+      }
       RowLayout {
         Layout.fillWidth: true
         Layout.preferredHeight: 32