When a container registry has many tags, it's easy for the DELETE call to take more
than 60 seconds and fail. This can also leave the registry in a bad state with
null bytes since some of the images have been deleted with tags still pointing to them.
In addition, we have to prevent users from accidentally initiating the delete multiple
times or this could leave the registry with orphaned tags.

This commit also adds a flash message to notify the user the registry is scheduled
for deletion.

Closes #49926, #51063

moved heights into variables

Closes #48182

improved variable & prop names

fixed content not updating in editor when changing template

Closes #47947

If ADO is implicitly enabled for a project due to the instance wide
setting feature or feature flag rollout then an owner or maintainer
visiting that project are going to see a banner.

Closes #50535

Updated docs, refactor import/export code
Fix AvatarUploader path issue
Fix project export upload webhook error

closes #51117