refs https://github.com/TryGhost/Team/issues/1358
- added acceptance tests for members settings screen
- subscription access management
- default post access management
- free tier management
- fixed `enableLabsFlag()` test helper overwriting existing flag settings when enabling another one
- updated API mocks and fixtures
- matched product fixtures to default tiers-enabled products
- updated product API mocks to include benefit handling
no issue
- add icon + icon color to the subscription access and default post access option lists
- updated templates to use icon in trigger and option display
- fixed ember-power-select styles overriding svgs in trigger
no issue
- provides clearer indication of current setting without having to expand anything
- has more minimal UI which helps when settings screen has multiple areas
no issue
- the membership setting screen will be covering a lot of areas, having individual settings as discrete components allows for easier re-organisation and cleaner parent templates and controllers
