Changed some activity properties
Created a show activity API endpoint
Changed some activity properties
Created a show activity API endpoint
Merge branch 'feature/api-activities-create-show-endpoint' of github.com:opf/openproject into feature/api-activities-create-show-endpoint

Conflicts:
	lib/api/v3/root.rb
Merge branch 'feature/api-activities-create-show-endpoint' of github.com:opf/openproject into feature/api-activities-create-show-endpoint
Fixed typo