remove gray background from "meta" cells, as it is too vague

[tigert]

Is your feature request related to a problem? Please describe. The right side data indication cells have a gray background, to indicate that the values cannot be edited, unlike the row name etc. This feels quite vague and I am not sure if people understand the distinction the gray background tries to make.

Describe the solution you'd like Remove the background to make the table more consistent, if needed, provide some mouseover hover effect on editable fields instead, or just do nothing.