Move cache setup to config/application.rb

Before this change we were trying to configure Rails.cache in an
initializer. It seems that by the time the initializers are loaded,
Rails.cache is already instantiated, so changing the settings does not
achieve anything anymore. This was causing Rails to default to a file
storage cache instead of the Redis cache, which in turn broke `rake
cache:clear`.
Pre-wrap code blocks in issue description

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>
Merge branch 'improve-issue-ui' into 'master'

Improve issue ui

Fix code overflow for description block

See merge request !1051
Merge branch 'redis/cache_settings' into 'master'

Move cache setup to config/application.rb

See merge request !1050