Fix for hardcoded OS drives (#9748)

Author: DavidPerikala

src/Files.Uwp/Helpers/CommonPaths.cs

@@ -26,6 +26,8 @@ public static class CommonPaths
 
         public static readonly string HomePath = Environment.GetFolderPath(Environment.SpecialFolder.UserProfile);
 
+        public static readonly string SystemRootPath = Environment.GetFolderPath(Environment.SpecialFolder.Windows);
+
         public static Dictionary<string, string> ShellPlaces = new Dictionary<string, string>() {
             { "::{645FF040-5081-101B-9F08-00AA002F954E}", RecycleBinPath },
             { "::{5E5F29CE-E0A8-49D3-AF32-7A7BDC173478}", "Home".GetLocalized() /*MyComputerPath*/ },

src/Files.Uwp/Helpers/UIHelpers.cs

@@ -2,6 +2,7 @@
 using Newtonsoft.Json;
 using System;
 using System.Collections.Generic;
+using System.IO;
 using System.Linq;
 using System.Threading.Tasks;
 using Windows.ApplicationModel.AppService;
@@ -94,7 +95,7 @@ public static async Task<BitmapImage> GetIconResource(int index)
 
         private static async Task<IEnumerable<IconFileInfo>> LoadSidebarIconResources()
         {
-            const string imageres = @"C:\Windows\System32\imageres.dll";
+            string imageres = Path.Combine(CommonPaths.SystemRootPath, "System32", "imageres.dll");
             var imageResList = await UIHelpers.LoadSelectedIconsAsync(imageres, new List<int>() {
                     Constants.ImageRes.RecycleBin,
                     Constants.ImageRes.NetworkDrives,

src/Files.Uwp/Views/Pages/PropertiesCustomization.xaml.cs

@@ -1,5 +1,8 @@
 using Files.Uwp.Filesystem;
+using Files.Uwp.Helpers;
 using Files.Uwp.ViewModels.Properties;
+using System;
+using System.IO;
 using System.Threading.Tasks;
 using Windows.UI.Xaml;
 using Windows.UI.Xaml.Controls;
@@ -16,7 +19,7 @@ public PropertiesCustomization()
 
         private void CustomIconsSelectorFrame_Loaded(object sender, RoutedEventArgs e)
         {
-            string initialPath = @"C:\Windows\System32\SHELL32.dll";
+            string initialPath = Path.Combine(CommonPaths.SystemRootPath, "System32", "SHELL32.dll");
             var item = (BaseProperties as FileProperties)?.Item ?? (BaseProperties as FolderProperties)?.Item;
             (sender as Frame).Navigate(typeof(CustomFolderIcons), new IconSelectorInfo
             {