Add PC option to menu

Firmware/ultralcd.cpp

@@ -2525,6 +2525,12 @@ static void mFilamentItem_PP()
     mFilamentItem(PP_PREHEAT_HOTEND_TEMP, PP_PREHEAT_HPB_TEMP);
 }
 
+static void mFilamentItem_PC()
+{
+    bFilamentPreheatState = false;
+    mFilamentItem(PC_PREHEAT_HOTEND_TEMP, PC_PREHEAT_HPB_TEMP);
+}
+
 static void mFilamentItem_FLEX()
 {
     bFilamentPreheatState = false;
@@ -2569,6 +2575,7 @@ void lcd_generic_preheat_menu()
         MENU_ITEM_SUBMENU_P(PSTR("ABS  -  " STRINGIFY(ABS_PREHEAT_HOTEND_TEMP) "/" STRINGIFY(ABS_PREHEAT_HPB_TEMP)),mFilamentItem_ABS);
         MENU_ITEM_SUBMENU_P(PSTR("HIPS -  " STRINGIFY(HIPS_PREHEAT_HOTEND_TEMP) "/" STRINGIFY(HIPS_PREHEAT_HPB_TEMP)),mFilamentItem_HIPS);
         MENU_ITEM_SUBMENU_P(PSTR("PP   -  " STRINGIFY(PP_PREHEAT_HOTEND_TEMP) "/" STRINGIFY(PP_PREHEAT_HPB_TEMP)),mFilamentItem_PP);
+        MENU_ITEM_SUBMENU_P(PSTR("PC   -  " STRINGIFY(PC_PREHEAT_HOTEND_TEMP) "/" STRINGIFY(PC_PREHEAT_HPB_TEMP)),mFilamentItem_PC);
         MENU_ITEM_SUBMENU_P(PSTR("FLEX -  " STRINGIFY(FLEX_PREHEAT_HOTEND_TEMP) "/" STRINGIFY(FLEX_PREHEAT_HPB_TEMP)),mFilamentItem_FLEX);
     }
     if (!eeprom_read_byte((uint8_t*)EEPROM_WIZARD_ACTIVE) && eFilamentAction == FilamentAction::Preheat) MENU_ITEM_FUNCTION_P(_T(MSG_COOLDOWN), lcd_cooldown);

Firmware/variants/1_75mm_MK3S-EINSy10a-E3Dv6full.h

@@ -509,6 +509,9 @@
 #define PP_PREHEAT_HOTEND_TEMP 254
 #define PP_PREHEAT_HPB_TEMP 100
 
+#define PC_PREHEAT_HOTEND_TEMP 280
+#define PC_PREHEAT_HPB_TEMP 105
+
 #define PET_PREHEAT_HOTEND_TEMP 230
 #define PET_PREHEAT_HPB_TEMP 85