Ability to choose the activity display when tapping on activity graph

[roznet]

as there are too many possibility, we should have a way for user to select his favourites to cycle through.

Idea suggested from bug report 34686:

Tapping the main chart graphic on an activity detail page has always
given me "too much information". But swiping used give
me four or five "interesting" charts. Now I believe it's
14 or 15. (I counted 208 total charts). I'd welcome a method
of specifying a few favorites to regularly swipe through
for activity details.