introducing repository settings controller
beginig the subnavigation
Merge branch 'staging' into 585-repository_settings_page
make subnavigatione method more flexible
using flexible subnavigation method
change position of the elements of the settings elements
move permissions tab into the settings subnav
remove edit and delet buttons
using partial for modal
use partial in repository subnavigation
use locale for modal for repository delete action
CSP Headers modified

should solve #381
removing unused variable
removed unused files
remove not necesseraly qoutes
using locales for tab and site titles
using named parameters
adding test for redirect
refactor modal partial

using locales for static text
avoiding denials
refactoring according to pull request

adding missing space in mehtod call