Update outdated app config values

Author: Morilli

src/BizHawk.Client.DiscoHawk/app.config

@@ -1,3 +1,3 @@
 <?xml version="1.0" encoding="utf-8"?>
 <configuration>
-<startup><supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.6.1"/></startup></configuration>
+<startup><supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.8"/></startup></configuration>

src/BizHawk.Client.EmuHawk/app.config

@@ -1,13 +1,13 @@
 <?xml version="1.0" encoding="utf-8"?>
 <configuration>
 	<startup>
-		<supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.6.1"/>
+		<supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.8"/>
 	</startup>
 	<runtime>
 		<loadFromRemoteSources enabled="true"/>
-		<gcAllowVeryLargeObjects enabled="true" />
+		<gcAllowVeryLargeObjects enabled="true"/>
 	</runtime>
-	<appSettings>
-		<add key="EnableWindowsFormsHighDpiAutoResizing" value="true" />
-	</appSettings>
+	<System.Windows.Forms.ApplicationConfigurationSection>
+		<add key="DpiAwareness" value="PerMonitorV2" />
+	</System.Windows.Forms.ApplicationConfigurationSection>
 </configuration>

src/BizHawk.Client.EmuHawk/app.manifest

@@ -35,13 +35,4 @@
 			<supportedOS Id="{8e0f7a12-bfb3-4fe8-b9a5-48fd50a15a9a}" />
 		</application>
 	</compatibility>
-	<!-- Indicates that the application is DPI-aware and will not be automatically scaled by Windows at higher
-				DPIs. Windows Presentation Foundation (WPF) applications are automatically DPI-aware and do not need 
-				to opt in. Windows Forms applications targeting .NET Framework 4.6 that opt into this setting, should 
-				also set the 'EnableWindowsFormsHighDpiAutoResizing' setting to 'true' in their app.config. -->
-	<application xmlns="urn:schemas-microsoft-com:asm.v3">
-		<windowsSettings>
-			<dpiAware xmlns="http://schemas.microsoft.com/SMI/2005/WindowsSettings">true</dpiAware>
-		</windowsSettings>
-	</application>
 </assembly>