Improve handling of the XWikiServer aliases

2 issues when you create an alias in a XWikiServer :

1°/ Since all the properties can be set in the aliases you can have conflictuous properties (visibiility public VS. visibiliy private)
possible solution : the sheet fully displays the object n°0 then loop over the object n°[1 to n] only displaying the server property. wdyt ?
2°/ All the aliases appear in the wikis list, even if they are differentiated from non-alias it's confusing.
possible solution : having one entry per XWikiServer document then list the aliases in a cell of the row. wdyt ?