Currently no columns have configurable data, but this can be added if desired (see issue report for demo).
API changes: type change in ListView.columns and getColumns; ListViewColumn.shownByDefault added.
[merged https://hudson.dev.java.net/svn/hudson/branches/configurable-view-columns-3465]


git-svn-id: https://hudson.dev.java.net/svn/hudson/trunk/hudson/main@17352 71c3de6d-444a-0410-be80-ed276b4c234a