Custom field URL needs a rel parameter

[helgator]

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

external links need to have the rel attribute noopener or noreferrer

Describe the solution you'd like

• add parameter field to add multiple rel attributes separated by space
• admin must be able to set default value
• this parameter needs its own permission so it can be set to allow only certain users to change its value

Additional context

none

[Quy]

Related #24337

[helgator]

Related indeed but I would prefer a user/admin controlled parameter and not a system wide general behavior because there are more rel attributes than just noopener or noreferrer. If #24337 becomes a parameter to the Custom Field URL my issue can be closed.