Summary:
Some things (like rendering cells) use the `visibleCol` for `createFormatter`, while other things (like `CopySelection`) used the `displayCol`. For references, the display column has type Any and doesn't know about the original formatting. This resulted in formatting being lost when copying from reference columns even though formatting was preserved when copying from the original (visible) column which looked identical. This diff fixes this and ensures that `createFormatter` is always used with the `visibleCol`. This was agreed on in https://grist.slack.com/archives/C0234CPPXPA/p1639571321043000
Additionally:
- Replaces the functions `createVisibleColFormatter` computed properties `visibleColFormatter` as suggested by a `TODO`.
- Extracts common code from `createVisibleColFormatter` in `ColumnRec` and `ViewFieldRec`
Test Plan: Fixed a test in CopyPaste which displayed the previous inconsistent behaviour.
Reviewers: jarek
Reviewed By: jarek
Differential Revision: https://phab.getgrist.com/D3189
Summary:
- This should make these easier to work with and make changes to.
- Removes one unused method.
Test Plan: No changes of behavior, existing tests should pass.
Reviewers: alexmojaki
Reviewed By: alexmojaki
Differential Revision: https://phab.getgrist.com/D3091
