[DataGrid] Improve edit cell UI

[oliviertassinari]

A follow-up on #1025. Proposed design:

I have more or less reproduced the outlined style.

[oliviertassinari]

I have added a new section in the storybook for dedicated visual regressions tests. I think that we can remove the visual regressions on the other stories. If these other stories are for testing edge cases, or stress tests, they probably don't need to be visually tested. If they are important, then they should either have a demo in the documentation or have a story under the visual regression folder. This would reproduce the tradeoff we have in the main repository. The only difference is that we have no tools to easily display the visual regressions.

[dtassone]

Not sure about this approach.
seems a bit segregated and I prefer to test some stories within their thematic folders. Maybe a prefix on the regressions tested stories would allow us to identify which one are tested?

[oliviertassinari]

I could do a prefix. A bit harder to find and filter but they would be, as you said, in a thematic folder. No strong preferences.

[oliviertassinari]

I guess that also the value of not using a semantic folder for the visual regressions. When you want to add a new regression test case, you don't need to care about it.

[oliviertassinari]

For instance, here, now I need to ask:

@dtassone Where should this visual regression test be?

It's a real question, I don't know exactly where to put it, should I create a new section? I know it should be under the folder for the DataGrid, and not, say the WindowSplitter.

[oliviertassinari]

I'm trying something, we will see

[dtassone]

Somewhere around here...
ie Commodity Edit Cell Snap ?
Suffix might actually be better 🤔

[DanailH]

I'm ok with the design, it does seem more intuitive.