Since residency_start_ms is -1 when entering the heatup while loop whilst the hotend temp is close to the target them already then it may not escape.

Hence "Start the TEMP_RESIDENCY_TIME timer when we reach target temp for the first time."

This may fix a subtle bug caused by doing `G29` more than once without
`G28` between.

Corrected:
MSG_KILLED
MSG_NO_MOVE
MSG_STOPPED
MSG_PRINT_ABORTED
MSG_ON
MSG_OFF

Added translation mentioned in issue #3351:
Homing would be best tranlated homing, or "Kører til udgangsposition".

#define MSG_SET_HOME_OFFSETS
#define MSG_LEVEL_BED_HOMING
#define MSG_LEVEL_BED_WAITING 
#define MSG_LEVEL_BED_DONE
#define MSG_LEVEL_BED_CANCEL 
#define MSG_HOME_OFFSETS_APPLIED

Optimised all added messages to fit within 16 Characters

Only measure and store filament width when E is going forward.

I think that that sentence has been completed its part. 
Because Kana fonts were revised by me the other day(PR #3289), who am a native Japanese.

And for @AnHardt,
I'd like to take this opportunity to express one's heartfelt gratitude as a far eastern person,
about you has been maintaining the resource of Japanese despite you are a far western person.

New messages translated:
#define MSG_LEVEL_BED_HOMING "Homing XYZ"
#define MSG_LEVEL_BED_WAITING "Click to Begin"
#define MSG_LEVEL_BED_DONE "Leveling Done!"
#define MSG_LEVEL_BED_CANCEL "Cancel"
. . .
#define MSG_HOME_OFFSETS_APPLIED "Offsets applied"

Add the missing translation (Spanish) issue #3353