Merge pull request #1129 from PavelSindler/MK3_for_merging

missing declaration fix

Firmware/messages.h

@@ -29,6 +29,7 @@ extern const char MSG_Enqueing[];
 extern const char MSG_ERR_STOPPED[];
 extern const char MSG_ERROR[];
 extern const char MSG_EXTRUDER[];
+extern const char MSG_FILAMENT[];
 extern const char MSG_FAN_SPEED[];
 extern const char MSG_FILAMENT_CLEAN[];
 extern const char MSG_FILAMENT_LOADING_T0[];
@@ -48,6 +49,7 @@ extern const char MSG_HEATING[];
 extern const char MSG_HEATING_COMPLETE[];
 extern const char MSG_HOMEYZ[];
 extern const char MSG_CHOOSE_EXTRUDER[];
+extern const char MSG_CHOOSE_FILAMENT[];
 extern const char MSG_LOAD_FILAMENT[];
 extern const char MSG_LOADING_FILAMENT[];
 extern const char MSG_M117_V2_CALIBRATION[];