SL-14497 Observers sometimes were notified with wrong flags

indra/newview/llmutelist.cpp

@@ -408,6 +408,8 @@ BOOL LLMuteList::remove(const LLMute& mute, U32 flags)
 		else
 		{
 			// The caller didn't pass any flags -- just remove the mute entry entirely.
+			// set flags to notify observers with (flag being present means that something is allowed)
+			localmute.mFlags = LLMute::flagAll;
 		}
 		
 		// Always remove the entry from the set -- it will be re-added with new flags if necessary.