custom fields on devices and ports in the web from config (#945)

* custom device field web display and edit

* make display work; relies on T::T calling dict slot or method with same syntax

* add storing port custom fields

* use resultset method instead, use cf_ prefix

* update Pg min ver for jsonb

* allow override of position and default for port custom fields

* support hidden for custom fields

* update description of Objects API class

* allow left and mid position for custom fields

* add custom fields in csv

* change port control sidebar label

* fix default missing bug on backend jobs

lib/App/Netdisco/Web.pm

@@ -111,6 +111,7 @@ use App::Netdisco::Web::TypeAhead;
 use App::Netdisco::Web::PortControl;
 use App::Netdisco::Web::Statistics;
 use App::Netdisco::Web::Password;
+use App::Netdisco::Web::CustomFields;
 use App::Netdisco::Web::GenericReport;
 
 sub _load_web_plugins {
@@ -391,7 +392,7 @@ $swagger_doc->{tags} = [
   {name => 'Search',
     description => 'Search Operations'},
   {name => 'Objects',
-    description => 'Retrieve Device, Port, and associated Node Data'},
+    description => 'Device, Port, and associated Node Data'},
   {name => 'Reports',
     description => 'Canned and Custom Reports'},
 ];