OPNSense/core 572d4afsrc/etc/inc gwlb.inc, src/www system_gateways.php system_gateway_groups.php

system: improve gateway status return; closes #3281

(cherry picked from commit a2b0a7d59e238b3a628abc164afebb8fd9863eb8)
DeltaFile
+20-12src/etc/inc/gwlb.inc
+1-2src/www/system_gateways.php
+2-0src/www/widgets/api/plugins/gateway.inc
+0-1src/www/system_gateway_groups.php
+23-154 files

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