system: handle persistent / important notifications more prominently in the header #7897

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Is your feature request related to a problem? Please describe.

Since the new dashboard we do not have a way to show a banner for live media boot or bootup progress messages. These two have been converted to the notifications on the development version, but they lack a better visibility and are odd because you can clear them but they will not actually clear.

Describe the solution you like

Integrate something for those persistent notifications into the header to make them more prominent outside the scope of one-time notifications to be dismissed. This would also leave the opportunity to finally do #7284

Describe alternatives you considered

N/A

Additional context

N/A