Started refactoring to reduce usage of Trello requests
Fixed syntax by adding missing comma
Fixed calling retreieveAllCardsFromTrello() in Main.gs
Fixed typo in function name retrieveAllCardsFromTrello
removed getAllHashTags function as it is not being used
Changed filter to 'visible' in retrieveAllCardsFromTrello()

To hide 'open' cards that are not found in the iteration board
added cards arg to updateHashTagsDetails