In order to get a link to a specific Jira item, you can simply type the Jira ID to search for it (no need to start your search with: "id:" as before although, it'll still work for sure).

This would give for example: 

More information on linking to external tickets like in Jira can be found here: Linking with external tickets - Example Jira

Note: It's not possible to search for Jira ticket ID directly in the global search box of the application, the best is to go in the Task212 Jira addon dashboard and search for the ID in the top right search box