Change the validation of the Argument Name field in the ViewModel dialog window

[DmitryFurs]

Describe the bug

Currently, we can't use an underscore _ in the argument name, only letters and numbers. The underscore character is not prohibited for use in layouts by Magento, so it must be allowed for use in the dialog window.

To Reproduce

1. Open any layout file
2. Right click on the block
3. Select the Inject a ViewModel... option
4. Fill in all the input data and use the view_model value for the Argument Name field
5. Click Ok button

Expected behavior

The View Model is added to the block with the specified name containing the underscore character.

Screenshots

Please complete the following information:

• OS: MacOS 10.15.7
• PhpStorm/Intellij version: 2020.2.3
• Plugin Version: 2.0.1

Additional context

Here are examples from the Magneto code where underscores are used:

• magneto/module-theme/view/frontend/layout/default.xml
• magneto/module-theme/view/frontend/layout/default.xml
• magneto/module-cookie/view/frontend/layout/default.xml
• magneto/module-cookie/view/adminhtml/layout/default.xml

[m2-assistant]

Hi @DmitryFurs. Thank you for your report.
To help us process this issue please make sure that you provided sufficient information.

Please, add a comment to assign the issue: @magento I am working on this

---

• Join Magento Community Engineering Slack and ask your questions in #github channel.

[drpayyne]

@magento I am working on this