Fix `--lua`/`--luaconsole` causing that window to open before MainForm

src/BizHawk.Client.EmuHawk/MainForm.cs

@@ -726,6 +726,8 @@ namespace BizHawk.Client.EmuHawk
 				};
 			}
 
+			Shown += (_, _) =>
+			{
 				//start Lua Console if requested in the command line arguments
 				if (_argParser.luaConsole)
 				{
@@ -736,6 +738,7 @@ namespace BizHawk.Client.EmuHawk
 				{
 					_ = Tools.LuaConsole.LoadByFileExtension(_argParser.luaScript.MakeAbsolute(), out _);
 				}
+			};
 
 			SetStatusBar();