#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

lib/App/Netdisco/DB/Result/NetmapPositions.pm

@@ -17,6 +17,8 @@ __PACKAGE__->add_columns(
   { data_type => "text[]", is_nullable => 0 },
   "vlan",
   { data_type => "integer", is_nullable => 0, default => 0 },
+  "depth",
+  { data_type => "integer", is_nullable => 0, default => 0 },
   "positions",
   { data_type => "text", is_nullable => 0 },
 );