Fix for issue 4062 (control-panel craps out when pointed (in error) to DS 6.3 (I assume any LDAP server))

The problem is that in some cases the property returned by UIManager through: UIManager.getBorder("List.focusCellHighlightBorder") can be null.

This issue has nothing to do with the fact that the server is local or remote, but with the look and feel of the system.

The fix consists of checking whether this border is defined or not; if it is not defined, use a predefined border.