retrySelectedJobs() was calling renderQueueTable + updateQueueActionButtons
+ updateStatusBar and then immediately awaiting startSelectedUpload(),
which runs the exact same trio right after. At 500+ failed jobs the
double render/sort/button-refresh freezes the UI for several seconds
after clicking "Erneut versuchen".
Drop the outer render trio — startSelectedUpload's one is enough. The
inner call sees the freshly-mutated job state in the same tick, so the
visible result is identical with half the work.
