[FeatureRequest]: Shortcut feature for 12864 display

[jltx1]

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

I would like to be able to assign a menu to a long press of the 12864 knob. This could be simply a return to the top menu. Or it could be an "urgent" menu like Z baby-stepping, or any number of practical and fun uses.

Describe the solution you propose.

Pressing the knob for ~1.5 seconds, as opposed to a click, would jump to the assigned shortcut menu.

Describe alternatives you've considered

Ex. A workaround exists but it is tedius, for example...

Provide any additional context or information.

Similar behavior is implemented in Prusa Marlin, though it is fixed to moving the Z axis.