#1009 neighbour map depth and/or until end of lldp chains

* sidebar and style changes

* switch server code to new params and values

* working algo for cloud and neighbor depth

* store map positions for lldp cloud with depth

* color the root node uniquely

* restrict all devices, depth, cloud map to < 1000 devices

share/schema_versions/App-Netdisco-DB-83-84-PostgreSQL.sql

@@ -0,0 +1,7 @@
+BEGIN;
+
+ALTER TABLE netmap_positions ADD COLUMN "depth" integer DEFAULT 0 NOT NULL;
+
+UPDATE netmap_positions SET depth = 0 WHERE device IS NOT NULL;
+
+COMMIT;