Overview page for dashboard users.

### Description

Previously (FF V2.1 or so..), when a user logs in that only has Dashboard access on one or more Dashboards, a message was displayed in Flowfuse that the user only has Dashboard access. Without specifying which Dashboards they have access to, and where they then have to (find and) go to their specific Dashboard(s).

Currently when logging in to Flowfuse with an account that only has Dashboard access, the Flowfuse Loading... graphic is displayed. Forever. (Guessing that is not the intention but it is what I am seeing).

IMHO it would be much more user friendly if a page was generated that displays the Dashboard(s) a user has access to, and can then click on to access the desired Dashboard.

Not only would this be more convenient for Dashboard user(s), it would also mean that Flowfuse access admins need only communicate one URL instead of each URL separately for each Dashboard. Which would greatly simplify the process and communication for access to new and existing Dashboard users.

### Which customers would this be available to

Team + Enterprise Tiers (EE)

### Have you provided an initial effort estimate for this issue?

I am not a FlowFuse team member