Hi @johan.ferner, thank you for reaching out.
I’m not 100% if that is already in the plans, but here is a link to our Jira plugin that enables the improvement you showed in the screenshot: https://github.com/mattermost/mattermost-plugin-jira. The newest version of the plugin works in Mattermost v5.2+ : https://github.com/mattermost/mattermost-plugin-jira/releases.