Enable default value from field settings

Problem/Motivation

There is only the "Average vote" option in the "Value to display as stars" setting which results in always displaying the average of the votes when the user is voting, which can either persuade the user towards a number of stars, or send the wrong vote.

Steps to reproduce

Add the fivestar field to any content, no special configuration is needed. Make sure the user can vote.
Create two users and vote the content to which the fivestar field was added with User 1, then go to the same page with User 2 and try to vote. You will see that the stars will be enabled as per the average result.

Proposed resolution

Enable the default option to take the default value configuration from the field settings.

User interface changes

The Default option will appear in the "Value to display as stars" configuration for the fivestar field in the Manage Display section.