Wait until saving has finished before resetting PDFViewerApplication._saveInProgress
(PR 12137 follow-up)
#12211
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I obviously missed this during review, but currently
PDFViewerApplication._saveInProgress
is reset synchronously inPDFViewerApplication.save
.That was probably not intended, since it essentially renders the
PDFViewerApplication._saveInProgress
check pointless given that the actual saving is an asynchronous operation.