Code cleanup, use array instead of handcrafted update.

git-svn-id: http://svn.redmine.org/redmine/trunk@13485 e93f8b46-1217-0410-a6f0-8f06a7374b81
Add public/plugin_assets directory (#8817).

git-svn-id: http://svn.redmine.org/redmine/trunk@13486 e93f8b46-1217-0410-a6f0-8f06a7374b81