Brings it a littler close to how "services" category works now.

1,2,3, this is a test...

o polling is going away
o idiomaitic way to enable/disable arp handling
o where does ip version prefer really fit in?
o unhide checkbox captions, as redundant as they may seem

(legacy) cleanup and validate url alias download, closes https://github.com/opnsense/core/issues/877

Simple names to complete drop-down

Signed-off-by: Isaac (.ike) Levy <ike@blackskyresearch.net>

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