[kcm] Fix list items

Fix bad spacing and unwanted separators

Raise icon size to 32px. This incidentally fixes the alignment of the
listitem text and also subjectively looks better to me.

src/kcm/package/contents/ui/Bluetooth.qml

@@ -94,19 +94,18 @@ ScrollViewKCM {
 
         delegate: Kirigami.SwipeListItem {
 
-            leftPadding: 0
-            rightPadding: 0
+            // content item includes its own padding
+            padding: 0
 
             contentItem: Kirigami.BasicListItem {
                 // The parent item already has a highlight
                 activeBackgroundColor: "transparent"
-                // Otherwise there are unnecessary margins
-                anchors.top: parent.top
-                anchors.bottom: parent.bottom
-                // No right anchor so text can be elided by actions
+
+                separatorVisible: false
 
                 text: model.Name
                 icon: model.Icon
+                iconSize: Kirigami.Units.iconSizes.medium
                 onClicked: kcm.push("Device.qml", {device: model.Device})
             }