David Winegar 1ad5f369af Allow switching platforms (#6964)
Allow switching platforms

Move the Chart.platform to Chart.platform.current instead, and add
ways to see available platforms and set the current platform. This
is necessary for adding tests that use the "basic" platform.
2020-01-26 15:33:20 -05:00
..
2019-12-31 12:56:15 -05:00