Add is_enable functionality
If dict is empty do not perform substitution
Added icons for up, down and delete actions. Icons from http://www.defaulticon.com/
Added styles for up, down, delete buttons. Added field for displaing current status
Added delete action handler. Add status change action.
Added description and button tooltip
Added extensiotn icon from https://www.iconfinder.com/icons/131820/replace_text_icon#size=32
Add locales files
Turn on i18n
Initial data from locale files
Initial data added into _locales