XWIKI-9795: Better way to handle advanced search options
* Removed the Advanced Search options since all filters have been moved to facets.
* The query boost option is no longer available but you can achieve the same thing from the query input and we'll add later a query boost configuration in the search administration section.
* Improve the display of the debug information (when search debug mode is enabled).
* Preserve the current facet values when submitting a new search query.
[misc] Fix typo.