Do not filter combined LF perimeter output

[ranchodeluxe]

Fixes https://github.com/Earth-Information-System/fireatlas/issues/45

Changes:

• Only filter snapshot output on isactive and mayreactivate and leave combined LF output alone (for perimeter layer)

[ranchodeluxe]

Seems to match what Yang was seeing in the ticket now:

Previous Perimeter Output

New Perimeter Output