Create a dashboard view of multiple hubs

[newgene]

This should be a dashboard view of all or selected known hubs from the list of "Existing connections":

• The dashboard should show all hubs (one hub as one box/tile) in a grid view
• Each hub tile should display some basic information (name, logo, some stats likes # of data srcs, builds etc, # of active tasks)
• Click a tile should connect to that hub
• Should have an interface to customize the hubs to be included in the dashboard, or other preferences. These preferences can be saved on browser-side
• Some hubs may not be accessible at a particular moment, which is fine and should not impact the display of other working hub tile.
• Should allow to switch between the dashboard view or the current connection view as the default landing page. The preference can be saved on browser-side as well.