Don't save log levels set from the command line

--loglevel, -d and -v are applied to the channels directly, and the next
config save wrote them to [Log], permanently replacing the user's levels.
The other command line options avoid this with DoNotSaveSetting.

The debugger had the same problem and a flag for it. Generalize that one
(NotifyChannelsChangedByDebugger -> DoNotSaveChannels) and set it here too.

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>

Core/CmdLine.cpp

@@ -583,6 +583,7 @@ void CommandLineOptions::ApplyToConfig() const {
 
 	if (logLevel.has_value()) {
 		g_logManager.SetAllLogLevels(logLevel.value());
+		g_logManager.DoNotSaveChannels();
 	}
 
 	if (oldAtrac.has_value()) {