Update message properties in-place instead of remove+insert

Author: radare

src/message_actions.vala

@@ -192,8 +192,8 @@ namespace Dc {
                 var msg = RpcClient.parse_message (msg_obj, rpc.self_email);
                 int idx = find_message_index (message_store, msg_id);
                 if (idx >= 0) {
-                    message_store.remove (idx);
-                    message_store.insert (idx, msg);
+                    Object[] replacements = { msg };
+                    message_store.splice (idx, 1, replacements);
                 }
             } catch (Error e) {
                 /* Reaction will appear on next message reload */

src/pinned_messages_manager.vala

@@ -188,8 +188,8 @@ namespace Dc {
             int idx = find_message_index (message_store, msg_id);
             if (idx < 0) return;
             var m = (Message) message_store.get_item (idx);
-            message_store.remove (idx);
-            message_store.insert (idx, m);
+            Object[] replacements = { m };
+            message_store.splice (idx, 1, replacements);
         }
     }
 }