Gnats 3954: Diagnostic Output Window keyboard shortcut gone

There are a couple reasons why the newer design of the Diagnostic Output window / panel does not support shortcuts. This design, which allows the placement of the Diagnostic Window INSIDE the SCT, necessarily doesn't use an actual QMenuBar widget for the menus. It is not reasonable to deploy a QMenuBar within a panel. ALSO, the panel's pseudo-menubar contains OTHER controls. Those would have to be seperated out to a seperate toolbar (on a second row).

Below are screenshots of (1) the Stand-Alone Diagnostics Dialog, and (2) the Diagnostics Output Panel within an SCT.