XWIKI-9977: The results are dependent of the current interface language
* Don't apply the 'locales' filter any more and rely only on the 'locale' facet, which has the current UI language preselected.

(cherry picked from commit 4a5396dc5cfcfc30dc6a2fa24763923cd6a50747)
XWIKI-9977: The results are dependent of the current interface language
* Improve the comment about the 'locales' filter.

(cherry picked from commit e2e52226d7dc94b441a3402b485ce2440db61176)