Modify tests to match new navigation behaviour for project pages

features/project/active_tab.feature

features/project/project.feature

features/steps/admin/active_tab.rb

features/steps/dashboard/active_tab.rb

features/steps/dashboard/shortcuts.rb

features/steps/profile/active_tab.rb

features/steps/project/active_tab.rb

features/steps/project/fork.rb

features/steps/project/project.rb

features/steps/project/project_milestone.rb

features/steps/shared/active_tab.rb

features/steps/shared/issuable.rb

features/steps/shared/project_tab.rb

features/steps/shared/sidebar_active_tab.rb