Enhance errors showing for the new Magento 2 GraphQl Resolver dialog window

[bohdan-harniuk]

Is your feature request related to a problem? Please describe.

Now, when creating new Magento 2 GraphQl Resolver, if there is any error, it is displayed in the separate modal dialog. When this dialog is closed, main dialog is closed too. So, to create new Magento 2 GraphQl Resolver, user have to repeat everything but considering what was said in that error message dialog. It is not user friendly and requires extra operations.

Describe the solution you'd like (*)

1. show error messages under the target fields
2. do not close a generation dialog after failed validation

[m2-assistant]

Hi @bohdan-harniuk. Thank you for your report.
To speed up processing of this issue, make sure that you provided sufficient information.

Add a comment to assign the issue: @magento I am working on this

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