To provide more control and convenience to the user, Redash offers the ability to apply filters on all of the dashboard queries at once, and group dashboards based on user-defined tags (#hashtags).
In addition, you can mark dashboard as favorite (exactly as you did in queries) for quicker access to your favorite dashboards.
When in edit Dashboard mode, you can see the following controls, as shown in the following screenshot:
Favorites, hashtags and global filter controls