and plumb them through the UI, persistence, analyzer/fixer and
other parts of the system. update the simplifier to use the new options.
update codegen features as necessary.

These tests were all using WpfFact, but not actually doing anything
that required either WPF or an STA thread. We plan to enable
parallelization of Facts (but not WpfFacts), and this ensures we can
parallelize as many tests as possible.

Put generate-type actions under a higher level "Generate Type" menu item if there are a lot of items in the code actions list.
If there aren't a lot of actions, then inline the items.
Simplify the wording of the "Generate type" actions to make the menu items cleaner.
Provide simple APIs to allow users to create top level menu actions with sub actions.

Fell out of our normal cadence for this during the push for RTM. Now that we
had a bit more breathing room getting us back on track here.

This reverts 99317ad0.

fixes internal issue #1107929

fixes internal issue #1107929