Fix AppX detection and add package restore support (#4842)

* Fix installed AppX package detection

* Add AppX package restore workflow

* Add AppX operation progress feedback

* Fix AppX operation launch race

* Handle AppX workflow failures

functions/public/Invoke-WPFButton.ps1

@@ -68,6 +68,7 @@ function Invoke-WPFButton {
         "WPFGetInstalledTweaks" {Invoke-WPFGetInstalled -CheckBox "tweaks"}
         "WPFAppxRemoval" {Invoke-WPFTab "WPFTab6BT"}
         "WPFBackToTweaks" {Invoke-WPFTab "WPFTab2BT"}
+        "WPFInstallSelectedAppx" {Invoke-WPFAppxInstall}
         "WPFRemoveSelectedAppx" {Invoke-WPFAppxRemoval}
         "WPFDefaultAppxSelection" {Invoke-WPFPresets "AppxDefault" -checkboxfilterpattern "WPFAppx*"}
         "WPFSelectAllAppx" {
@@ -77,7 +78,7 @@ function Invoke-WPFButton {
             $sync.configs.appxHashtable.Keys | ForEach-Object {$sync.$_.IsChecked = $false}
         }
         "WPFGetInstalledAppx" {
-            $installedAppxPackages = Get-AppxPackage -AllUsers | Select-Object -ExpandProperty Name
+            $installedAppxPackages = Get-WinUtilInstalledAPPX
             foreach ($appx in $sync.configs.appxHashtable.GetEnumerator()) {
                 if ($appx.Value.PackageId -in $installedAppxPackages) {
                     $sync.$($appx.Key).IsChecked = $true