Cannot select more than one option in multiple select boxes

[gastaldi]

Whenever I choose more than an option in a multiple select box, only one item gets selected
Steps to Reproduce:

• Choose Wildfly Swarm Microservice project type
• Click Next twice
  -- You should be presented with a multiple select box select
• Select more than one option
• Click anywhere in the page to invoke the field's onchange
  -- The select box only selects one option

[edewit]

done, was due to adding the 'multi select' attribute dynamically