Differentiate different type of extensions in extensions manager: Concept of channel

[slicerbot]

This issue was created automatically from an original Mantis Issue. Further discussion may take place here.

[jamesobutler]

Currently, the following types of extension are visible for the end user:

• Extension officially build by the factory:
  • For end user
  • Testing
• Extension submitted using "ExperimentalUpload"

It should be possible to selectively display these extensions in the manager. By default only extensions made for end user should be visible.

Are extensions uploaded by experimental (aka non-factory) build machines actually available in the extensions manager for download? Anyone could do this? Is there a security concern related to this type of upload and distribution?