don't leak dbus replies

Author: hsitter

package/contents/ui/DBusPrimary.qml

@@ -28,7 +28,13 @@ QtObject {
     function call(callback) {
         const reply = DBus.SessionBus.asyncCall(root.msg) as DBus.DBusPendingReply
         if (callback) {
-            reply.finished.connect(() => callback(reply))
+            reply.finished.connect(() => {
+                callback(reply)
+                // Make sure to destroy after the reply is finished otherwise it may get leaked because the connected signal
+                // holds a reference and prevents garbage collection.
+                // https://discuss.kde.org/t/high-memory-usage-from-plasmashell-is-it-a-memory-leak/29105
+                reply.destroy()
+            })
         }
     }
 }