This makes the required changes needed to make the editor components
and sagas lazy-load to improve the time before the first render of the
app.
This is done by making sure we only import types from the monaco editor
module anywhere other than the saga and the component modules and using
React.lazy to lazy-load the component and start the sagas.
This cuts the main bundle time to less than 1/2 so load time should be
over twice as fast now.
This replaces the ace editor with the monaco editor. It fixes quite a
few small paper-cut bugs and should be easier to add code completion
to in the future.
Many of the snippets are omitted but can be added back later if needed.
Otherwise, we have tried to preserve the existing look and feel as much
as possible.
David Lechner