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• keyboard shortcuts (e.g. "open the filter form", "open the sorting form",...)
• multi-dimensional frequency distribution (Manatee should be able to do this but this must be tested first)
  • produce some time-based charts (e.g. a frequency of a word during time)

• Rewrite frequency distribution result page to React+Flux
• simplified asynchronous concordance processing (a first step in longer rewrite, actually)
  • get rid of pidfile and store the calculation status within a respective cache record in Redis (this should apply for both Celery and multiprocessing variants)