Improved consistency of appearance, when multiple CSS toolkits are in use
- This change makes sure that consistently [::xowiki::CSS toolkit] is used instead of accessing the package parameter "PreferredCSSToolkit" directly. This change is necessary for handling e.g. of the parameter setting "default" consistently. Previously, a "default" value could result in loading the obsolete YUI .js and .css files.
- When "menu_entries" have multiple "config" entries, use the last one.