[ORL-78] Add support for arbitrary modules in Configurable Shaders

[orels1]

Should be done in a form of simple drag&drop fields

_{From SyncLinear.com | ORL-78}

[orels1]

Got this mostly working.

• Allows to define if a module is a custom module
• Allows simple drag & drop for custom modules
• If a module is not found (as its currently saved as a string path) - shows a string field for editing
• After editing the module path string to be valid gain / removing the module - you can use Force Reimport button to refresh the configurable shader

[orels1]

This is implemented in dev and will be available in the next dev build (dev 12)