Fix ExtUI invalid speed, timer (#15031)

Marlin/src/feature/babystep.cpp

Marlin/src/feature/babystep.h

Marlin/src/feature/pause.cpp

Marlin/src/feature/prusa_MMU2/mmu2.cpp

Marlin/src/gcode/config/M43.cpp

Marlin/src/gcode/lcd/M0_M1.cpp

Marlin/src/gcode/stats/M75-M78.cpp

Marlin/src/lcd/extensible_ui/ui_api.cpp

Marlin/src/lcd/extensible_ui/ui_api.h

Marlin/src/lcd/menu/menu_delta_calibrate.cpp

Marlin/src/libs/stopwatch.cpp

Marlin/src/module/probe.cpp