[Fix] Use copy instead of reference for overriding message flags (#2200)

* fix: use copy instead of reference for overriding message flags

* doc: update changelog

Note: the initial attempt at fixing this issue (#2090) was also included
in order to make the development process more trackable.

src/widgets/helper/ChannelView.cpp

@@ -605,7 +605,7 @@ void ChannelView::setChannel(ChannelPtr underlyingChannel)
                     }
                     else
                     {
-                        overridingFlags = message->flags;
+                        overridingFlags = MessageFlags(message->flags);
                         overridingFlags.get().set(MessageFlag::DoNotLog);
                     }