gs-details-page: Show also release date
Please expose the 'Last Updated' date for flatpaks and snaps. That date shows when the last update of the app to the store by its maintainer took place. That date is shown on the online store https://snapcraft.io/store for snaps. The Flathub store https://flathub.org/apps also have that date, so it would make sense to show that date for both, snaps and flatpaks.
Rationale: Some snaps have not been updated since several months (example https://snapcraft.io/jabref, last updated on Aug 18 2017), so that date gives an indication to users whether the snap is still maintained by its uploader or not.
Note: I'm not certain on the terminology here, it could be the 'Last Upload' date since we are talking about uploads to the store.
Edited by Milan Crha