I'm afraid this isn't possible with the 'Quick Links' gadgets dashboard. Although there are some alternatives suggestion in this thread: https://community.atlassian.com/t5/Jira-questions/Is-there-a-Gadget-simliar-to-quot-Quick-Links-quot-that-can-be/qaq-p/116588
Have a look there.
Connect with like-minded Atlassian users at free events near you!Find an event
Connect with like-minded Atlassian users at free events near you!
Unfortunately there are no Community Events near you at the moment.Host an event
You're one step closer to meeting fellow Atlassian users at your local event. Learn more about Community Events