Add option to revert previous changes to windows defaults

Scripts/GUI/Show-MainWindow.ps1

@@ -1484,6 +1484,57 @@ function Show-MainWindow {
         UpdateNavigationButtons
     })
 
+    # Handle Home Revert link button
+    $homeRevertLinkBtn = $window.FindName('HomeRevertLinkBtn')
+    if ($homeRevertLinkBtn) {
+        if (-not (Test-Path $script:SavedSettingsFilePath)) {
+            $homeRevertLinkBtn.Visibility = 'Collapsed'
+        }
+
+        $homeRevertLinkBtn.Add_Click({
+            $savedSettings = LoadJsonFile -filePath $script:SavedSettingsFilePath -expectedVersion "1.0" -optionalFile
+            if (-not $savedSettings -or -not $savedSettings.Settings) {
+                return
+            }
+
+            $revertSelection = Show-RevertSettingsModal -Owner $window -LastUsedSettings $savedSettings
+            $selectedFeatureIds = @($revertSelection.SelectedFeatureIds)
+            $shouldRestartExplorer = ($revertSelection.RestartExplorer -eq $true)
+
+            if (-not $selectedFeatureIds -or $selectedFeatureIds.Count -eq 0) {
+                return
+            }
+
+            # Keep runtime/control parameters and clear actionable selections before adding selected revert targets.
+            $actionableKeys = @()
+            foreach ($k in $script:Params.Keys) {
+                if ($script:ControlParams -notcontains $k) {
+                    $actionableKeys += $k
+                }
+            }
+            foreach ($k in $actionableKeys) {
+                $script:Params.Remove($k)
+            }
+
+            AddParameter 'Undo'
+
+            foreach ($featureId in $selectedFeatureIds) {
+                if ($script:Features.ContainsKey($featureId)) {
+                    $feature = $script:Features[$featureId]
+                    if ($feature.RegistryUndoKey -and $feature.UndoAction) {
+                        AddParameter $featureId
+                    }
+                }
+            }
+
+            # Use the existing apply modal to execute and present progress/completion.
+            Show-ApplyModal -Owner $window -RestartExplorer $shouldRestartExplorer
+
+            # Close the main window after the apply dialog closes
+            $window.Close()
+        })
+    }
+
     # Handle Home Default Mode button - apply defaults and navigate directly to overview
     $homeDefaultModeBtn = $window.FindName('HomeDefaultModeBtn')
     $homeDefaultModeBtn.Add_Click({