Fix renaming files to same name with different case

Source/Editor/Modules/ContentDatabaseModule.cs

@@ -464,12 +464,6 @@ namespace FlaxEditor.Modules
                 MessageBox.Show("Cannot move folder. Target location already exists.");
                 return;
             }
-            if (!item.IsFolder && File.Exists(newPath))
-            {
-                // Error
-                MessageBox.Show("Cannot move file. Target location already exists.");
-                return;
-            }
 
             // Find target parent
             var newDirPath = Path.GetDirectoryName(newPath);

Source/Engine/Content/Content.cpp

@@ -574,7 +574,7 @@ bool Content::RenameAsset(const StringView& oldPath, const StringView& newPath)
     Asset* newAsset = GetAsset(newPath);
 
     // Validate name
-    if (newAsset != nullptr || FileSystem::FileExists(newPath))
+    if (newAsset != nullptr && newAsset != oldAsset)
     {
         LOG(Error, "Invalid name '{0}' when trying to rename '{1}'.", newPath, oldPath);
         return true;