[#3030] Move suppress active class into _active()
[#3030] Fix suppress_activew
[#3030] Combine code adding icons
[#3030] Deprecate subnav_named_route() as identical function nav_named_route() exits
[#3030] Remove unused code in lib.helpers - now got via routes
[#3030] Bugfix subnav_named_route()
[#3030] Increase code sharing in lib helpers
[#3030] Further code refactor
Merge branch 'master' into 3030-clean-helper-functions

Conflicts:
	ckan/lib/helpers.py

    trivial merge
Merge branch 'master' of github.com:okfn/ckan into 3030-clean-helper-functions
Merge branch '3030-clean-helper-functions'