Layout errors don't go away in Widget Inspector

[johnpryan]

I an unable to make an Overflow error go away in the Widget Inspector by updating the widget and hot-reloading.

Steps to reproduce

1. Create an overflow error (in this case using a Row of TagChip widgets)
2. Fix the error by changing Row to Wrap
3. Hot Reload the app
4. Observe that "Errors: 2" is still showing up in the widget inspector, after the issue is fixed.

[johnpryan]

Also, it looks like the Widget Inspector isn't updating after hot-reloading.

[elliette]

Also, it looks like the Widget Inspector isn't updating after hot-reloading.

Chatted offline, this was because widget tree auto-refreshing wasn't enabled.

With widget tree auto-refreshing enabled:

• Replacing a widget causing an error with a new one in the tree does cause the overflow error to disappear (e.g. replacing a Row widget with a Wrap widget)
• Adding a widget to the tree that fixes the overflowing widget (which is still in the tree) does not cause the overflow error to disappear (e.g. wrapping the Row widget in an Expanded).

TLDR; we still have a bug here that should be fixed.