Add a Separator to NAT list page and rule page

[raydoom]

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

A clear and concise description of what the problem is including your motivation for the request, i.e. "For the purpose of [...] I am missing a solution that will [...]."

Describe the solution you like

Add a Separator to Port Forward list page and Rule list page(and some where need)as a row, The separator can be customized with a name and movable ,To make it easier to categorize items

Describe alternatives you considered

Additional context