Fix jobs sorting if condition is empty (#236)

Signed-off-by: Lauri Nevala <lauri.nevala@gmail.com>

dashboard/client/components/+workloads-jobs/jobs.tsx

@@ -35,7 +35,7 @@ export class Jobs extends React.Component<Props> {
         sortingCallbacks={{
           [sortBy.name]: (job: Job) => job.getName(),
           [sortBy.namespace]: (job: Job) => job.getNs(),
-          [sortBy.conditions]: (job: Job) => job.getCondition().type,
+          [sortBy.conditions]: (job: Job) => job.getCondition() != null ? job.getCondition().type : "",
           [sortBy.age]: (job: Job) => job.getAge(false),
         }}
         searchFilters={[