Allow unattended install through option /autoextract, placed at the end of the installer command line

Author: datadiode

Installer/MakeSFX.exe

@@ -4,5 +4,7 @@ expand.exe -f:* %2 .
 echo [OpennessWebView2.dll] > OpennessWebView2.ini
 echo BrowserExecutableFolder=%~dp0%~n2 >> OpennessWebView2.ini
 :register
-regsvr32.exe OpennessWebView2.dll
+set options=
+for %%x in (%*) do if /i "%%x" == "/autoextract" set options=/s
+regsvr32.exe %options% OpennessWebView2.dll
 del %0