Subviews and frozen columns scroll issue #263

First, thanks for this excellent framework! no words can describe how great it is, and how much work it saved me!

I would like to have an overlay view, I'm doing it using the info from this related merged fix:
#33
#57

Please see the red vertical overlay view in this screenshot:

The issue is when scrolling I would like it to go below the frozen green column, can it be done using existing code, or the only way is to add this feature to the framework?

Thanks!

Expected Behavior

When adding a subview using spreadsheet.addSubview(myView) and having also a frozen column, the subview should scroll below the frozen column

Actual Behavior

the subview scrolls to the left and appears above the frozen column

Steps to Reproduce the Problem

1. Add a spreadsheet with 1 frozen column
2. Add normal rows and columns to the sheet
3. Add a subview to the sheet, which internally is added to the overlayView
4. Scroll the content

Specifications

• Xcode version: 12
• iOS version: 14
• Dependency manager + version: Cocoapods 10