CE-248 Fix for displying double sorting arrows in tables
CE-248 Moving the removal inside if condition
CE-248 Moving fix inside the tablesorter extension, checking for existance of arrows before inserting them
CE-248 Caching function used multiple times
CE-248 Wikia comment
Merge pull request #1068 from Wikia/CE-248-tablesorter-double-arrows

CE-248 Fix for displying double sorting arrows in tables