Output local property if CA-Config lookup cannot find anything

[auniverseaway]

As an author, I want the ability to set a component-level property that may not correspond to a CA-Config so that I can set custom values that are not associated with a CA-Config.

Context

When using colorfield, we use CA-Config DataSource to populate the field of pre-defined colors. There may be times and contexts where a custom color is needed. The field should be able to set the custom color, and the inline style worker should respect and output that if it cannot find the value (which is normally the config name) in the list of configurations it's looking for.