UPDATE: Feb 11 2019
Unfortunately, following the upgrade to Moodle 3.5 we are currently unable to re-order the units on our Dashboard.
Development of the Dashboard page has been identified as a high priority by the university and work is underway to improve how this works.
In the meantime, here are some solutions which will we hope will assist you in navigating your units.
Your default view of your Dashboard is 'In Progress'
The 'All My Unit's page will list up to 200 units which you may be enrolled in'. You can search this page easily with Ctrl+F
The "All units' option will bring up a search box where you can search for any Moodle site. You can search by Unit Code or Unit Title