Qml/main: add a not implemented dialog to the delete button

src/leek/qml/Main.qml

@@ -83,6 +83,16 @@ Kirigami.ApplicationWindow {
                     }
                     Controls.Button {
                         text: "Delete"
+                        onClicked: notImplementedDialog.open()
+                        Kirigami.Dialog {
+                            id: notImplementedDialog
+                            title: "Not implemented!"
+                            standardButtons: Kirigami.Dialog.Ok
+                            padding: Kirigami.Units.largeSpacing
+                            Controls.Label {
+                                text: "Deleting is not implemented yet"
+                            }
+                        }
                     }
                 }
             }