Ability to tell the user about system maintenance. Want a banner on workbench2. A very simple implementation could be a public config item exported by Controller where an admin can populate a message to be shown to user, e.g. "we are aware of performance issues and are investigating a fix" or "scheduled maintenance on Saturday November 29th 21:00-23:00, Arvados will be unavailable". Display of the banner could be one of (TBD): * -Box at the top of the screen, which pushes the content down until it is dismissed- this is going to difficult with the existing layout, some things are fixed number of pixels from the top * Dialog overlay that pops up when the app is loaded, which must be dismissed Could add a menu item to the "notification" menu which brings the message back after being dismissed. Assume data will come from a URL which will be part of the public config. The URL body will have HTML which should be rendered inside the banner box.

Users would like to have a tooltip for an instant feedback (fe. information that project name is incorrect)