Receive editor settings from host app to improve offline support

[dcalhoun]

What problem does this address?

Currently, we retrieve the editor settings when the editor open. However, this approach means that if there is no internet connection, the settings will not be retrieved. This leads to disabling several editor features—block colors, theme styles, etc.

What is your proposed solution?

We should expect the host app to pass editor settings to the editor, so the host app manages retrieval and caching of the settings for offline support.