User environment variable name/value length validation missing

[randomir]

Bug description

Variable name can not be longer than 255 chars, but the error is never displayed to the user (if console output is not counted).

Similarly for the value (but different limit, 64k).

Steps to reproduce

Try creating a variable with name longer than 255 chars.

After clicking "Add Variable", the dialog will close, but variable will not be added. No indication of an error will be visible in the UI.

Instead, an error message is printed in the dev console:

Workspace affected

No response

Expected behavior

Variable name length validation is expected on "Add Variable" action, together with charset check, in the validate function.

Example repository

No response

Anything else?

No response