Extract duplicate functions used in inline editing cells

[enjeck]

probably it would make sense to extract this to a separate helper function as it is being used in multiple 'inline editing'-PRs?

Originally posted by @silverkszlo in #1977 (comment)

We shouldn't even be defining the column and rowId props within the Cell file, since we already define within the mixin.

[enjeck]

Also, remove nonInlineEditableColumnTypes() and references of it