Feature Request: Expression for Alias field name under general tab for widget

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Would be amazing if Input can utilise the Expression field for Alias creation. Thus, pull a value from the form upon entering it, which then updates the alias in the form.

An example: You have a boolean toggle to show hidden content. This alias has a code which is computed from the fields completed in the hidden content. Thus, once the fields have been completed you can collapse the form again and easily see the code in the alias, indicating that section has been completed. This is then easy to keep track of which section you have completed in a form with multiple hidden sections.

No file, test, or entry point is named. Start by locating the widget's General-tab Alias and Expression handling, then trace how form values are evaluated and refreshed while editing. Done means an Alias can use an Expression based on completed form fields and updates when those values change.

Written by the indexing model from the issue text.