title: Liferay leave select-type custom field empty
body: <p>I have some custom fields in Liferay which are displayed as selection lists. These fields are not mandatory so the user should be able to leave them blank. How can I achieve this? Now always the first value is selected by default. I tried to enter a blank line before the options in the "default value" field of the custom field configuration form, but it had no effect.</p>