When saving N64 plugins, reduce the number of times it shows the message "A core reboot is needed" from 3 to 2. A 50% reduction in redundancy!

BizHawk.Client.EmuHawk/MainForm.Events.cs

@@ -1800,8 +1800,7 @@ namespace BizHawk.Client.EmuHawk
 				}
 				else
 				{
-					GlobalWin.MainForm.FlagNeedsReboot();
+					// Do nothing, Reboot is being flagged already if they chaned anything
-					GlobalWin.OSD.AddMessage("Plugin settings saved but a core reboot is required");
 				}
 			}
 			else