Decompile Scope=perUserOrMachine.

Fixes wixtoolset/issues#9144

Author: barnson

src/wix/WixToolset.Core.WindowsInstaller/Decompile/Decompiler.cs

@@ -3051,10 +3051,18 @@ private void FinalizeSummaryInformationStream(TableIndexedCollection tables)
                                     else
                                     {
                                         var xAllUsers = this.DecompilerHelper.RootElement.Elements(Names.PropertyElement).SingleOrDefault(p => p.Attribute("Id")?.Value == "ALLUSERS");
+                                        var xMsiInstallerPerUser = this.DecompilerHelper.RootElement.Elements(Names.PropertyElement).SingleOrDefault(p => p.Attribute("Id")?.Value == "MSIINSTALLPERUSER");
                                         if (xAllUsers?.Attribute("Value")?.Value == "1")
                                         {
                                             xAllUsers?.Remove();
                                         }
+                                        else if (xAllUsers?.Attribute("Value")?.Value == "2" && xMsiInstallerPerUser?.Attribute("Value")?.Value == "1")
+                                        {
+                                            this.DecompilerHelper.RootElement.SetAttributeValue("Scope", "perUserOrMachine");
+
+                                            xAllUsers?.Remove();
+                                            xMsiInstallerPerUser?.Remove();
+                                        }
                                     }
                                 }
 

src/wix/test/WixToolsetTest.CoreIntegration/TestData/DecompileNullComponent/Expected.wxs

@@ -1,5 +1,5 @@
 <Wix xmlns="http://wixtoolset.org/schemas/v4/wxs">
-  <Package Codepage="65001" Language="1033" Manufacturer="Example Corporation" Name="MsiPackage" UpgradeCode="{047730A5-30FE-4A62-A520-DA9381B8226A}" Version="1.0.0.0" InstallerVersion="200" ProductCode="{6F9B5694-F0F1-437C-919B-0D2DAF2D9DEA}">
+  <Package Codepage="65001" Language="1033" Manufacturer="Example Corporation" Name="MsiPackage" UpgradeCode="{047730A5-30FE-4A62-A520-DA9381B8226A}" Version="1.0.0.0" InstallerVersion="200" ProductCode="{6F9B5694-F0F1-437C-919B-0D2DAF2D9DEA}" Scope="perUserOrMachine">
     <StandardDirectory Id="ProgramFilesFolder">
       <Directory Id="INSTALLFOLDER" Name="MsiPackage" ShortName="oekcr5lq">
         <Component Id="filcV1yrx0x8wJWj4qMzcH21jwkPko" Guid="" Bitness="always32">