make job queue list in webinterface configurable (#469)

* add an option so you can define the amount of jobs returned in the webinterface jobq

* and now the actually working version

lib/App/Netdisco/JobQueue.pm

@@ -59,8 +59,9 @@ Performs initialisation of the Job Queue backend.
 
 =head2 jq_log()
 
-Returns a list of the most recent 50 jobs in the queue. Jobs are returned as
-objects which implement the Netdisco job instance interface (see below).
+Returns a list of the most recent jobs as defined in C<jobs_qdepth> from the
+queue. Jobs are returned as objects which implement the Netdisco job instance
+interface (see below).
 
 =head2 jq_userlog( $user )
 

lib/App/Netdisco/JobQueue/PostgreSQL.pm

@@ -273,7 +273,7 @@ sub jq_log {
   return schema('netdisco')->resultset('Admin')->search({}, {
     prefetch => 'target',
     order_by => { -desc => [qw/entered device action/] },
-    rows => 50,
+    rows     => (setting('jobs_qdepth') || 50),
   })->with_times->hri->all;
 }
 

share/config.yml

@@ -324,6 +324,7 @@ workers:
 
 # 50 minutes
 jobs_stale_after: 3000
+jobs_qdepth: 50
 
 dns:
   max_outstanding: 50