Group subjobs by job.

src/database/models/SubJob.js

@@ -31,6 +31,7 @@ export const SubJob = {
   columns: ['_id', 'printer', 'printer._id', 'job._id', 'state', 'createdAt'],
   filters: ['state', '_id', 'job._id', 'printer._id'],
   sorters: ['createdAt', 'state'],
+  group: ['job'],
   properties: [
     {
       name: '_id',
@@ -67,6 +68,12 @@ export const SubJob = {
       readOnly: true,
       columnWidth: 175
     },
+    {
+      name: 'job',
+      label: 'Job',
+      type: 'object',
+      objectType: 'job'
+    },
     {
       name: 'job._id',
       label: 'Job ID',