Add a relative icon path helper. This is primarily for the NPM module to resolve non-sprite icons
Add a relative icon path helper. This is primarily for the NPM module to resolve non-sprite icons

Fixes #295

jumpinjackie/mapguide-react-layout,jumpinjackie/mapguide-react-layout,jumpinjackie/mapguide-react-layout,jumpinjackie/mapguide-react-layout,jumpinjackie/mapguide-react-layout