Anki add-on: HUMBLE PIE: "distinct cards studied today" statistic

PROBLEM: The main window has a statistic that says "Studied X cards in Y minutes today." This counts repeated cards in the total. In other words, if you learnt 50 distinct cards today, but repeated them each twice, Anki tells you you studied 100 cards today. This overestimates how many distinct pieces of knowledge you reviewed. SOLUTION: This addon modifies the message so that only distinct cards are counted. In other words, if you learnt 50 cards, but repeated them each twice, Anki will show "Studied 50 distinct cards in Y minutes today." Even though repeats are ignored for card count, the total minutes spent studying is still displayed accurately. Also, it will only make this change on the main window--not the statistic window. NOTE: If you want to use this together with the add-on More Decks Stats and Time Left, open the latter's add-on folder (Tools>Add-ons>View files) and replace the text in the file called "mds_time_left" with the text found in this link: https://www.codepile.net/pile/mPOVqaoq CREDIT: Made by Joseph Yasmeh. Tested on Anki 2.0 and 2.1 on Mac.