[Grist homepage] Add a picture to customize a Grist document in the document list

[RaywanS]

Describe the problem to be solved

Hi team,

As you can see in the screenshot, we only see big grey blocks when we connect to Grist, which is not super sexy and not super helpful to find the document we want to work on.

Describe the solution you would like

A quick and sexy update could be to be able to load an image to be able to customize a document and be able to easily find it in the list. It might sounds a bit unimportant, but I know it will be super appreciated by all Grist users around the world (just like the ability to add an emoji to customize a Grist table -> it always make people happy with a "wahoo effect".

An alternative would be to show the first page of the Grist document by default

It will look like this