- fix: A bug where it was possible to delete a system page if it were made

the child of a non-system page that you had edit rights to.
 - api: Added a unified contraints system for the file and image assets.
- fixed several problems with the new attachments control, setup, and tempspace

docs/upgrades/upgrade_7.3.22-7.4.0.pl

@@ -98,6 +98,7 @@ sub addWikiAttachments {
     $db->write("alter table WikiPage drop column storageId");
     my $root = WebGUI::Asset->getRoot($session);
     $root->addChild({title=>"Tempspace", url=>"tempspace", className=>"WebGUI::Asset::Wobject::Folder"}, "tempspace0000000000000"); 
+    $db->write("update asset set isSystem=1 where assetId=?", ["tempspace0000000000000"]);
 }
 
 #-------------------------------------------------