CON-2324 fix url under wikia logo
CON-2324 adjust logic for generating global search URL
CON-2324 move methods to helper class and add unit tests
CON-2324 call GlobalNav helper instead of controller and some stylizing
CON-2324 merge two functions into one and add unit tests
Merge remote-tracking branch 'origin/dev' into CON-2324

Conflicts:
	extensions/wikia/GlobalNavigation/GlobalNavigation.setup.php
Merge pull request #5691 from Wikia/CON-2324

CON-2324 fix url under wikia logo