Currently the ordering in which dashboards show up in the "Dashboards" tab is lexicographic (AFAICT) and there is no way to override.
This is definitely not ideal since most users who are using dashboards for production stuff (as we do)
will definitely have some "production-ready" / "most important" dashboards that should show up as first in the list, followed by other, perhaps less-important, perhaps WIP, dashboards.
Without being able to define the ordering of dashboards, we are forced to use hacks like coming up with dashboard names that artificially show up higher in the list - clearly suboptimal.