...

Would it be possible to add a "upload_maxsize" property to the XWiki.XWikiPreferences class? Instead of having to add it yourself in the class when you need it. For example, when you reset the database and want to import your backup archive, if the archive is too big then you are stuck. Because when you try to edit the XWiki.XWikiPreferences class to add the upload_maxsize property, there is no button to add a property to the class. So basically I think you are stuck. I think the best solution would be to have the upload_maxsize field present by default, like all the other fields, in the XWiki.XWikiPreferences class. However I dont know how to do this on my installation, and maybe it would be nice to have it in XWiki.

See also http://jira.xwiki.org/jira/browse/XWIKI-1811