.Net 4.8 Rendering and Filters not working, Buttons events working ok, but Column is not showed as Button, just text.

[StrannikVK]

I worked on this problem for a few weeks.....(Demo is working)
You can get my fork and test project to see result. address on the bottom

Problem with new project: When I'm bringing object from ToolBox to new form/control (DataListView, FastDataListView) I can't make IsButtom column look like button. It seems rendering is not working, Can't make filter work (almost duplicate code from the samples, not working)

Properties can't be set in designer mode:
CellPadding- Can't be set at Column properties "Text "text" cannot be parsed. The expected text format is "1"."
Fork @
https://github.com/StrannikVK/ObjectListView2020.git
Test Project:
ObjectListViewTools2020.csproj