CONN-401 consistent thread count filtering

The sub-forum thread filtering excludes `comments_index` rows where
`archived != 0`. This results in inconsistent numbering between the
per forum thread counts and the total thread count displayed at the top
of the page.
PLA-1481 articles quantity decrease for wiki match
PLA-1452 content namspace support added
PLA-1452 0 namespace only
PLA-1452 content ns + lowered minimal article score
PLA-1482 slop for phrase and query set to 1, for both queries
VID-1702 fixing template name
Video (VID-1703): VideoPageTool - updated thumbnail option
Merge pull request #3648 from Wikia/VID-1703

Video (VID-1703): VideoPageTool - updated thumbnail option
Merge pull request #3614 from Wikia/CONN-401

CONN-401 consistent thread count filtering
Merge branch 'dev' into PLA-covarage-tests
PLA-1482 change everything
Merge remote-tracking branch 'upstream/PLA-covarage-tests' into dev-pch