Type "User" fields are broken

[danaivehr]

Hi!

All custom fields with type "user" except assignee and with type Boolean are broken with your plugin:

• I have two custom fields with type "user" and "Drop down list" rendering. After plugin install these fields rendered like text fields with user "id" from database as value.
• I also have one custom field with type "boolean" and "Rasio button" rendering. After plugin install this field rendered like checkbox.

In text field plugin appears to work very well.

Redmine version 3.2.0.stable

Please see the images below.

Before:

After: