increase Capybara.default_wait_time from 7 to 12 (#12822)
shorten comment lines at test/ui/base.rb
use database_cleaner (#12822)
prevent UI test failure randomly
increase Capybara.default_wait_time from 6 to 7 (#12822)
German translation updated by Daniel Felix (#14277)
increase Capybara.default_wait_time from 5 to 6 (#12822)
Code cleanup.