Hi,
my dropdown edit controls for the foreign key columns are differently styled, or in other words have a different background color, than the other edit controls. I noticed, that the slightly different background colors come from the "readonly" property of the dropdown controls (input element), but I don't know, where this property comes from.
See the following screenshot for the issue of different background colors between the various edit controls (dropdown of 'Ship City' has another background color than the other controls):
I've also created a little demo, that show the problem: https://stackblitz.com/edit/ccd4bf?file=index.html,index.ts
Any idea how to solve this?