JENKINS-22755 - RunParameter no longer displays the Full Display Name
Merge branch 'JENKINS-22755' of github.com:gcummings/jenkins
[FIXED JENKINS-22755] Noting merge of #1214.
JUnit 4.
${h.breakableString(…)} might be called with a null argument if something is broken.
For robustness, pass on the null to Jelly rather than failing page rendering.