[FIXED JENKINS-11100] master label should be editable if there's a

cloud.

changelog.html

@@ -73,6 +73,9 @@ Upcoming changes</a>
   <li class=bug>
     Cancelling a parent multi-config build produce deserializable build.xml
     (<a href="https://issues.jenkins-ci.org/browse/JENKINS-10903">issue 10903</a>)
+  <li class=bug>
+    Label of the master should be editable if cloud is set up.
+    (<a href="https://issues.jenkins-ci.org/browse/JENKINS-11100">issue 11100</a>)
   <li class=rfe>
     YUI updated to 2.9
   <li class=rfe>

core/src/main/resources/jenkins/model/MasterBuildConfiguration/config.groovy

@@ -5,7 +5,7 @@ def f=namespace(lib.FormTagLib)
 f.entry(title:_("# of executors"), field:"numExecutors") {
     f.textbox()
 }
-if (!app.slaves.isEmpty()) {
+if (!app.slaves.isEmpty() || !app.clouds.isEmpty()) {
     f.entry(title:_("Labels"),field:"labelString") {
         f.textbox()
     }