I'm a little late to the party but finally sharing a set of menu files for the 12864 type displays.
https://github.com/tinkerlifeprojects/DUET3D_12864LCD_MenuFiles
They design is loosely based on the "TinkerFirmware" for the ultimaker printers. It has two "Main" pages with shortcuts to common functions and then a set of menus for controlling more aspects of the printer.
Any suggestions or requests are welcome