Fixed bug in loose search: The parameter 'exact=false' in the and()/or() methods did not change the queries added earlier to the query context
(f.e. the type attribute). This lead to no results because for inexact search the search term has to be lowercase.
The fix causes all existing search attributes to have the same isExact flag set.
Added custom error pages. There's a new string parameter Page.showOnErrorCodes. If it contains an error code like '404', the page will be shown instead of the container's built-in error page.