Improve / fix FTDI EVE Touch UI (#17338)

- Fix timeout and debugging string
- Fix check for whether `LCD_TIMEOUT_TO_STATUS` is valid
- Fix incorrect debugging message
- Make capitalization of callbacks consistent.
- Allow Touch UI to use hardware SPI on Einsy boards
- Move print stats to About Printer page.
- More generic about screen with GPL license.
- Add missing handler for power loss event
- Less code duplication on status screen and main/advanced menu; more legible
- Reorganize advanced and main menu to add more features
- Hide home Z button when using Z_SAFE_HOMING
- Fix compilation errors when certain features enabled
- Fix missing labels in UI
- Improve color scheme
- Add new preheat menus
- Fix incorrect rendering of Marlin logo on boot
- Add Level X Axis and Auto calibrate buttons

Marlin/src/gcode/feature/powerloss/M1000.cpp

@@ -63,7 +63,7 @@ void GcodeSuite::M1000() {
       #if HAS_LCD_MENU
         ui.goto_screen(menu_job_recovery);
       #elif ENABLED(EXTENSIBLE_UI)
-        ExtUI::OnPowerLossResume();
+        ExtUI::onPowerLossResume();
       #else
         SERIAL_ECHO_MSG("Resume requires LCD.");
       #endif

Marlin/src/gcode/temp/M303.cpp

@@ -73,7 +73,7 @@ void GcodeSuite::M303() {
   if (!WITHIN(e, SI, EI)) {
     SERIAL_ECHOLNPGM(STR_PID_BAD_EXTRUDER_NUM);
     #if ENABLED(EXTENSIBLE_UI)
-      ExtUI::OnPidTuning(ExtUI::result_t::PID_BAD_EXTRUDER_NUM);
+      ExtUI::onPidTuning(ExtUI::result_t::PID_BAD_EXTRUDER_NUM);
     #endif
     return;
   }