Task filtering: add No Due Date group and preserve section grouping on category filter#31

JoeProgrammer88 merged 2 commits intomainSpeakingInBits/TaskManagerWeb:mainfrom

copilot/add-no-due-date-task-filterSpeakingInBits/TaskManagerWeb:copilot/add-no-due-date-task-filterCopy head branch name to clipboard