Because of using <input type="text"> for VARCHAR fields it's not able to insert or edit large values to these fields because the maximum lenght of the textfield values are limited by HTML and/or the browsers.
It uses <textarea> for larger VARCHAR (<255) in this patch.
It means I cannot try it, because when I do
git apply < context-4-atempt-4.diff
I get an error.
attempt -5
I have updated the patch.
Patch accepted, congratulations.