* Removed deprecated translations
* Added back panel wizard link which was removed by mistake!

* Removed unnecessary new line

* Show hidden docs since Panels are hidden documents

[Misc] Fixed regressions introduced by commit https://github.com/xwiki/xwiki-platform/commit/ade4046 which moved the deprecated IncludeMacroParameters.getDocument() method to xwiki-platform-legacy-rendering-*. The main problem was that a lot of our code was still using {{include document="..."/}} (instead of {{include reference="..."/}}). The other problem was that I made a mistake and forgot to check for an empty "document" parameter.

[misc] We different versions of Lucene on different branches so we must make sure the index folder is not reused across branches during tests.

 * add hidden field so the save code knows we selected nothing

 * avoid the NPE if the credentials are null

[misc] We use different versions of Lucene on different branches so we must make sure the index folder is not reused across branches and even across tests.

(cherry picked from commit d98e1f77)

[Misc] Small loss of coverage after last commit (didn't expect it, sorry). Actually in practice it's tested in other modules so the overall coverage has slightly increased and no decreased...

* More simplification.
* Change Main.SolrSearchConfig to merge the provided configuration with the default one.

* Simplify a bit the configuration.

* Configure the Solr Search UI specifically for the FAQ application.
* Display the translated pretty name of the matched property in the search result highlights.
* Add support for configuring a default filter query.
* Add support for configuring the facet query (preselected facet values).

* Add script service API to resolve a XClass property reference
* Improve SolrFieldStringEntityReferenceResolver to support resolving relative references.
* Move search facets in separate documents
* Extract the configuration in a separate document.

Fixed.

[Misc] Removed code having no effect since UIExtension Manager is not considering the parameters textarea as containing script and thus it's not evaluated through Velocity at the moment! The Scheduler and Stats Apps are hidden for non admins only because there are rights set that prevent non admins to view them!

* Add support for detecting IE11+ and use it for shortcut registration.