Templates List /Table layout: Hide preview field

[jameskoster]

In the Templates data view the preview thumbnail is only helpful in Grid layout, where it is large enough to communicate a reasonable preview. In List and Table layouts it's simply too small.

Let's hide the preview field in List and Table layout for now.

[oandregal]

Some thoughts about how we could implement this:

1. In the consumer (Pages, Templates, Patterns):
   1. It may declare a field depending on the view.type. For example, it may declare all fields for grid but omit featured image for tables and list.
   2. It may declare all the fields for all views, but provide different render for each: the grid gets the "preview", but table/list can act as a boolean/string (as in "has featured image" or not).
2. As part of the DataViews APIs.
   1. We could hide the mediaField from the list and table.
   2. As part of the view.layout, we could have hiddenFields the user cannot make visible.
   3. For list & grid, we do not render any field of type image that is not set as mediaField.

[oandregal]

Added a new option above:

For list & grid, we do not render any field of type image that is not set as mediaField.

Adding some context. I was thinking about how would we manage a situation in which there were two images:

• table: just fine, it's another column
• grid & list: unsure how we'd do it

[jameskoster]

As with #58012 I'm a little hesitant about this one now. Linking field availability to layout feels a bit at-odds with the data views concept. Ideally all fields should work in all layouts, and it's up to the user which ones to include or not. In this case, I think we should explore ways to make the template preview work in List layout. I'll open a new issue for this.