kcmkwin: Port deprecated KNewStuff signals

This also avoids an unnecessary reload when the changedEntries
are cleared.

src/kcmkwin/kwindecoration/package/contents/ui/main.qml

@@ -106,7 +106,11 @@ Kirigami.Page {
                                 icon.name: "get-hot-new-stuff"
                                 visible: KAuthorized.authorize("ghns")
                                 configFile: "window-decorations.knsrc"
-                                onChangedEntriesChanged: kcm.reloadKWinSettings()
+                                onEntryEvent: function (entry, event) {
+                                    if (event == 1) { // StatusChangedEvent
+                                        kcm.reloadKWinSettings()
+                                    }
+                                }
                             }
                         }
                     }

src/kcmkwin/kwineffects/package/contents/ui/main.qml

@@ -125,7 +125,11 @@ ScrollViewKCM {
                 text: i18n("Get New Desktop Effects...")
                 visible: KAuthorized.authorize("ghns")
                 configFile: "kwineffect.knsrc"
-                onChangedEntriesChanged: kcm.onGHNSEntriesChanged()
+                onEntryEvent: function (entry, event) {
+                    if (event == 1) { // StatusChangedEvent
+                        kcm.onGHNSEntriesChanged()
+                    }
+                }
             }
         }
     }