remote-info: Show collection ID if available

If flatpak is compiled with P2P support and the commit in question has a
collection ID in its metadata, show it.

Closes: #1312
Approved by: alexlarsson
This commit is contained in:
Internal Server Error - Gitea: Git with a cup of tea
500 Internal Server Error

Gitea Version: 1.28.0+dev-477-g8b6ad49a5f