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/Plugin/Device/Details.pm

@@ -23,8 +23,7 @@ ajax '/ajax/content/device/details' => require_login sub {
             '+as' => ['has_snapshot'],
             join => 'snapshot',
           },
-        )->with_times()
-        ->hri->all;
+        )->with_times->with_custom_fields->hri->all;
 
     my @power
         = schema(vars->{'tenant'})->resultset('DevicePower')