#2477 Improved M-code control for stealth mode/normal mode

[vintagepc]

This closes #2477 and allows dynamic gcode mode changes, for example to get crash detect in risky print areas, or faster MBL:

M914
G28 W
G80
M915

Features & changes:

• Enable M914/915 for TMC2130 to allow setting stealth and normal mode via g-code.
• Optional "P" argument to write the change to EEPROM when using M code
• Optional 'R' argument to revert to EEPROM value.
• Default behaviour is temporary, i.e. any change is lost either on M84 or reboot.
• Fix possible logic hole causing FORCE_HIGH_POWER_MODE_START to not shift modes if PSU_Delta is defined and there's a stepper timeout before MBL (e.g. slow heating or high target temp)
• Updated stealth mode menus in Tune and Settings menu to indicate if an override is in place. (Menu shows "M915" or "M914" as appropriate. Chosen because no translation is required)
• Shared code for M914/5, partially shared with force_high_power_mode()

Picture, during MBL in stealth mode with an override:

[vintagepc]

Hm, something's not quite right with MBL. Investigating.

[vintagepc]

I think the issue has been resolved, it now plays nicely with MBL again.

[vintagepc]

Closing - deprecated by #4053