Added view/remove pinger sections for tweaking scope, and a lot of bug fixes

• added SingleMenu class for simple selection views

• changed user metadata to a single dict instead of a list of dicts to avoid duplicates removal weirdness and double firing on merges
  • added coursedict handling for int to str key normalization issue which results in duplicate keys in json

• renamed occasions where sections are incorrectly named as courses

• fixed weirdness due to persistent selections on menus in AddCourseSearch

• made search return more results before truncating due to pagnation

• fixed errors on sections with multiple timespans and on no sections instead of returning empty dict