Fix status box styling on Jira issue details page

There is a minor UI issue in Jira issue details page as noted in this comment:

I also noticed a small UI issue not related to this MR (it's also on master) while testing the Jira issues (the Open status box shows both the icon and text). I will probably create a follow-up to fix this (and maybe update the icon since we now use something else).

We should do the following to polish the UI:

• Update the icon to the new open / closed issues used in the normal GitLab issues.
• Make sure the UI (margins and mobile view) looks similar to GitLab issues.

Availability & Testing

Suggestion: Run package-and-qa to ensure that the UI changes don't have any side effects on the QA tests.