Allow field display to show posted scores

**Is your feature request related to a problem? Please describe.**
At some of our tournaments, we only get two screens, which we use for each of the fields (Field 1 and Field 2). This means we don't have a third display dedicated to the audience display, and so I am constantly switching the field screen to audience display just so I can post the scores, and then I set it back to field again afterwards. The reason I can't have it consistently set to an audience display, with a field timer, is that then the randomization doesn't show on 'Randomize' (it only does on 'Show Random'), but we oftentimes are randomizing while the other field is still in a match, so it must set back to a Field display for the personnel to easily see it.

**Describe the solution you'd like**
Either allow the audience display bound to a field to show the randomization, or the field display to be able to have scores posted to it (could be a separate option to not change the current behavior I guess?)

**Describe alternatives you've considered**
I keep changing the display type back and forth manually. Leaving it as audience or field display does not work fully work as previously explained between post scores and randomization requiring the different display to be set.