Replaced “New Job” with “New Item” since various plugins (such as...

Replaced “New Job” with “New Item” since various plugins (such as cloudbees-folder) add TopLevelItemDescriptor’s which do not produce Job’s.
(Might be feasible to automatically use “Job” or “Item” according to the most specific common supertype of all registered descriptors?)

core/src/main/resources/hudson/model/Messages.properties

@@ -29,7 +29,7 @@ AbstractBuild.BuildingInWorkspace=\ in workspace {0}
 AbstractBuild.KeptBecause=This build is kept because of {0}.
 
 AbstractItem.NoSuchJobExists=No such job \u2018{0}\u2019 exists. Perhaps you meant \u2018{1}\u2019?
-AbstractItem.Pronoun=Job
+AbstractItem.Pronoun=Item
 AbstractProject.AssignedLabelString_NoMatch_DidYouMean=There\u2019s no slave/cloud that matches this assignment. Did you mean \u2018{1}\u2019 instead of \u2018{0}\u2019?
 AbstractProject.NewBuildForWorkspace=Scheduling a new build to get a workspace.
 AbstractProject.AwaitingBuildForWorkspace=Awaiting build to get a workspace.