* test using existed cards
* plot new and review
* convert learning cards & use line chart
* allow draw multiple simulations in the same chart
* support hide simulation
* convert x axis to Date
* convert y from second to minute
* support clear last simulation
* remove unused import
* rename
* add hover/tooltip
* fallback to default parameters
* update default value and maximum of deckSize
* add "processing..."
* fix mistake
