Data set editor shows 'supports expression reference $null' as a hint

When creating a new data set, a hint for Data source JNDI name text input box states:

Data source JNDI name, supports expression reference $null

This is because curly brackets in this message are not properly escaped in the DashboardConstants.properties file. It contains

sql_datasource_description=Data source JNDI name, supports expression reference ${org.kie.server.persistence.ds}