Only show drag handles when the playlist contains more then one song

If there's only one song, you couldn't drag it anywhere anyway.

src/qml/MediaPlayListView.qml

@@ -163,6 +163,7 @@ Kirigami.Page {
                             isPlaying: model.isPlaying
                             metadataModifiableRole: model && model.metadataModifiableRole ? model.metadataModifiableRole : false
                             listView: playListView
+                            showDragHandle: playListView.count > 1
                         }
                     }
 
@@ -279,6 +280,7 @@ Kirigami.Page {
                             isPlaying: model ? model.isPlaying : false
                             metadataModifiableRole: model && model.metadataModifiableRole ? model.metadataModifiableRole : false
                             hideDiscNumber: model && model.isSingleDiscAlbum
+                            showDragHandle: playListView.count > 1
 
                             listView: playListView
 

src/qml/PlayListEntry.qml

@@ -61,7 +61,7 @@ BasePlayListDelegate {
             spacing: Kirigami.Units.smallSpacing / 2
 
             Loader {
-                active: !simpleMode
+                active: !simpleMode && playListEntry.showDragHandle
                 sourceComponent: Kirigami.ListItemDragHandle {
                     listItem: playListEntry
                     listView: playListEntry.listView

src/qml/mobile/MobilePlayListDelegate.qml

@@ -73,6 +73,7 @@ BasePlayListDelegate {
 
             // drag handle (for list reordering)
             Kirigami.ListItemDragHandle {
+                visible: playListEntry.showDragHandle
                 listItem: playListEntry
                 listView: playListEntry.listView
                 onMoveRequested: ElisaApplication.mediaPlayListProxyModel.moveRow(oldIndex, newIndex)

src/qml/shared/BasePlayListDelegate.qml

@@ -36,6 +36,7 @@ Kirigami.AbstractListItem {
 
     property var listView
     property bool simpleMode: false
+    property bool showDragHandle: true
 
     signal startPlayback()
     signal pausePlayback()