Feature Request - Extend Scheme Features

[JaimeStill]

Summary of the new feature/enhancement

Allow stylistic properties of a profile to be set by a scheme so these properties do not need to be duplicated among profiles. These properties should also have global default values.

Proposed technical implementation details (optional)

Suggested properties:

• acrylicOpacity
• useAcrylic
• fontFace
• fontSize
• cursorShape
• padding

Additionally, any of the properties set by a scheme should be able to be overridden by the profile, as is the case for background.

The style of the UI would be determined in this way:

1. Check for properties in the profile
2. Check for any missing properties in the scheme
3. Set any remaining properties using their global defaults

[DHowett-MSFT]

This'll turn into themes in some future version. Until then, we'll just keep these settings profile-local. It'll be helped a little bit by profile inheritance from #754.

[zadjii-msft]

Huh, this is a dead ringer for the "profiles should be a combination of an appearance and a task" thing that Dustin's always talked about