Duplicated fields for regex pattern on attribute's page

[aliaksander-samuseu]

Description

When custom validation rule is defined for an attribute using "Regex Pattern" field, a duplicated field with the same value appears on the attribute's page

Steps To Reproduce

1. Login to oxTrust
2. Move to "Attributes" page
3. Edit attribute "Password" by adding next regex as "Regex pattern" property: ^(?=.*[0-9])(?=.*[a-z])(?=.*[A-Z])(?=.*[!@#&()–[{}]:;'.,?/*~$^+=<>]).{8,32}$
4. Move to another page, then get back to "Attributes" page and open properties of the attribute modified before

Actual behavior

For some reason, additional property "Validation RegExp" appears, containing the same value set for "Regex Pattern" before. It seems like a legacy name for this field that somehow still comes up on the page. It isn't related to any feature (but better to double-check with Gasmyr or Yuriy about that).

There is also "Enable custom validation for this attribute" checkbox there which purpose isn't exactly clear. It seems to hide/unhide "Validation RegExp" field, but if you try to put something in the later and save the page, nothing seems to persist. Seems like only "Regex pattern" actually accepts input - and when this happens, "Enable custom validation for this attribute" checkbox gets set automatically.

Overall, the functionality is very confusing and needs to be streamlined.