Make deletions show like timeouts/bans. (#2841)

Co-authored-by: pajlada <rasmus.karlsson@pajlada.com>

src/common/Channel.cpp

@@ -239,6 +239,14 @@ void Channel::replaceMessage(size_t index, MessagePtr replacement)
 }
 
 void Channel::deleteMessage(QString messageID)
+{
+    auto msg = this->findMessage(messageID);
+    if (msg != nullptr)
+    {
+        msg->flags.set(MessageFlag::Disabled);
+    }
+}
+MessagePtr Channel::findMessage(QString messageID)
 {
     LimitedQueueSnapshot<MessagePtr> snapshot = this->getMessageSnapshot();
     int snapshotLength = snapshot.size();
@@ -251,10 +259,10 @@ void Channel::deleteMessage(QString messageID)
 
         if (s->id == messageID)
         {
-            s->flags.set(MessageFlag::Disabled);
-            break;
+            return s;
         }
     }
+    return nullptr;
 }
 
 bool Channel::canSendMessage() const