Russian "almost_x_years" changed by Mikhail Velkin (#12645)
German translation updated by Daniel Felix (#13202)
fix typo at app/models/user.rb (#5719)
Contributed by Tom Copeland.
Optimizes the SQL query behind Principal#member_of.
Use #per_page instead of #items_per_page.
Fixed that messages are not sorted by last reply (#12243).
replace tabs to spaces at app/controllers/boards_controller.rb
replace tabs to spaces at app/models/issue.rb
replace tabs to spaces at app/models/setting.rb
replace tabs to spaces at app/helpers/application_helper.rb
