[fix] engine brave - fetch traits (modified settings menu)

Brave has changed it settings menu fundamental.  Region codes are no longer in
the HTML page, we have to read the regional codes from a JS:

  https://cdn.search.brave.com/serp/v2/_app/immutable/chunks/parameters.734c106a.js



Signed-off-by: Markus Heiser <markus.heiser@darmarit.de>