Fixups for PID_ADD_EXTRUSION_RATE and HOTENDS==1

Suppress warnings

Follow-up the PR #4024 (Greek Language by @psavva)

Fix for the PR #4256 (Additional tweaks for HOTENDS == 1)

Don't deploy/stow the probe if z-min-endstop is used for homing

Repair M100

X_DUAL_STEPPER_DRIVERS

Improve STATIC_ITEM implementation

Don't deploy/stow the probe if z-min-endstop is used for homing.
Don't apply `zprobe_zoffset` if probe was not used.

・Update forgotten Configuration.h of K8400

M100 D was running too long - caused watchdog resets.
M100 I showed more free memory than a Arduino Mega has RAM.

Two strategies to address a stuck buzzer

Adjust wait_for_cooling slope

Greek Language by @psavva

Adjust wait_for_cooling slope
and drop mintemp for cooling.

See
https://github.com/MarlinFirmware/Marlin/pull/4169#issuecomment-231544532

Update language_cz.h

Total print time for LCD correction (hours:minutes format)

Dyze High Temp Thermistor Support

Additional tweaks for HOTENDS == 1

Follow-up the PR #4253 (Runout Sensor without SD Card, Print Timer support in M104), etc

New strings:
#define MSG_HALTED
#define MSG_PLEASE_RESET
Some texts shortened for smaller displays.

・Update forgotten example configuration files