Update language_da.h

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

Marlin/language_da.h

@@ -44,11 +44,11 @@
 #define MSG_COOLDOWN                        "Afkøl"
 #define MSG_DISABLE_STEPPERS                "Slå stepper fra"
 #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_SET_HOME_OFFSETS                "Sæt home offsets"
-#define MSG_HOME_OFFSETS_APPLIED            "Offsets applied"
+#define MSG_LEVEL_BED_WAITING               "Tryk for at starte"
+#define MSG_LEVEL_BED_DONE                  "Justering er færdig!"
+#define MSG_LEVEL_BED_CANCEL                "Annuller"
+#define MSG_SET_HOME_OFFSETS                "Sæt forskyding til udgangsposition"
+#define MSG_HOME_OFFSETS_APPLIED            "Forskydninger er tilføjet"
 #define MSG_SET_ORIGIN                      "Sæt origin"
 #define MSG_SWITCH_PS_ON                    "Slå strøm til"
 #define MSG_SWITCH_PS_OFF                   "Slå strøm fra"