Fix incorrect path while upward to root disk (#860)

* Fix incorrect path while upward to root disk

Author: hez2010

Files/Views/InstanceTabsView.xaml.cs

@@ -311,18 +311,14 @@ public static string NormalizePath(string path)
             }
             else
             {
-                if (path.Contains('\\'))
+                if (!path.EndsWith(Path.DirectorySeparatorChar))
                 {
-                    return Path.GetFullPath(new Uri(path).LocalPath)
-                    .TrimEnd(Path.DirectorySeparatorChar, Path.AltDirectorySeparatorChar)
-                    .ToUpperInvariant();
-                }
-                else
-                {
-                    return Path.GetFullPath(path)
-                    .TrimEnd(Path.DirectorySeparatorChar, Path.AltDirectorySeparatorChar)
-                    .ToUpperInvariant();
+                    path += Path.DirectorySeparatorChar;
                 }
+
+                return Path.GetFullPath(new Uri(path).LocalPath)
+                .TrimEnd(Path.DirectorySeparatorChar, Path.AltDirectorySeparatorChar)
+                .ToUpperInvariant();
             }
         }