Enable MA0140 and fix noncompliance (except in Cores)

"Both if and else branch have identical code"
see 618951403

.global.editorconfig.ini

@@ -321,7 +321,7 @@ dotnet_diagnostic.MA0109.severity = silent
 # Use the Regex source generator
 dotnet_diagnostic.MA0110.severity = error
 # Both if and else branch have identical code
-dotnet_diagnostic.MA0140.severity = silent
+dotnet_diagnostic.MA0140.severity = warning
 
 ## Menees.Analyzers rules
 

src/BizHawk.Client.EmuHawk/MainForm.FileLoader.cs

@@ -169,15 +169,12 @@ namespace BizHawk.Client.EmuHawk
 							 */
 							var dearchivalMethod = SharpCompressDearchivalMethod.Instance;
 
+#if false // making this run always to restore the default behavior where unrecognized files are treated like roms --adelikat
 							if (string.IsNullOrEmpty(archive) && dearchivalMethod.CheckSignature(file, out _, out _))
+#endif
 							{
 								sortedFiles[LoadOrdering.Rom].Add(fileInformation);
 							}
-							else
-							{
-								// This is hack is to ensure that unrecognized files are treated like ROMs
-								sortedFiles[LoadOrdering.Rom].Add(fileInformation);
-							}
 
 #if false
 							/*

src/BizHawk.Emulation.Cores/BizHawk.Emulation.Cores.csproj

@@ -5,7 +5,7 @@
 	<Import Project="../MainSlnCommon.props" />
 	<PropertyGroup>
 		<AllowUnsafeBlocks>true</AllowUnsafeBlocks>
-		<NoWarn>$(NoWarn);CA1806;CA1825;CA2214;MA0084;SA1100;SA1120;SA1129;SA1137;SA1205;SA1208;SA1400</NoWarn>
+		<NoWarn>$(NoWarn);CA1806;CA1825;CA2214;MA0084;MA0140;SA1100;SA1120;SA1129;SA1137;SA1205;SA1208;SA1400</NoWarn>
 		<Nullable>disable</Nullable>
 	</PropertyGroup>
 	<ItemGroup>