478709: Support multi-selection in the artefact ordering section of the
server editor 

Change:
 - multi selection support
 - the table height adapts to the number of artefacts attached to the 
   server instance: it is never less than 5 lines, grows with the number 
   of modules up to 10 lines, then it displays the scrollbar
 - configuration changes are applied only when editor is saved
 - externalize NLS strings

Task-Url: https://bugs.eclipse.org/bugs/show_bug.cgi?id=478709
3 files changed