Organization of dashboard lists.

## What?

When there are many dashboards, it becomes difficult to find dashboards if you don't know the name. Browsing through multiple pages is time consuming and frustrating. An option to group dashboards by some attribute would make navigation easier.

Some possible attributes could be functional (authentication, application, firewalls, switches, etc.), departmental (Ops, Security, etc.), product vendor (cisco, PAN, Carbon Black, etc.). Preferably, the user would choose the grouping attribute rather than having them provided by the product.

## Why?

Customers have complained that it is difficult to find a dashboard when there are dozens or hundreds to choose from. If you don't know the name of the dashboard, it requires you to scroll through page after page of dashboards.

## Your Environment

* Graylog Version:
* Elasticsearch Version:
* MongoDB Version:
* Operating System:
* Browser version: