Updated MOST model for webgen

Updates
- Imagine presets in module variables
- Optional Imagine preset for full size image not yet in model, is there in the code. This has the option to upload
full size images, but to only present for instance max 1024 images orso.
- relation not unique between collection and media to prevent issues in creation etc
- added zipcode in media for GeoLocation parts, not used active ATM
- Extra actions defined for the Media and Collection Controller parts (multiupload, import, delete)