Add rename sheet menu.

Firmware/ultralcd.cpp

@@ -6326,11 +6326,56 @@ static void lcd_select_sheet_menu()
     MENU_END();
 }
 
+static void lcd_rename_sheet_menu()
+{
+    struct MenuData
+    {
+        bool initialized;
+        uint8_t selected;
+        char name[sizeof(Sheet::name)];
+    };
+    static_assert(sizeof(menu_data)>= sizeof(MenuData),"MenuData doesn't fit into menu_data");
+    MenuData* menuData = (MenuData*)&(menu_data[0]);
+
+    if (!menuData->initialized)
+    {
+        eeprom_read_block(menuData->name, EEPROM_Sheets_base->s[(eeprom_read_byte(&(EEPROM_Sheets_base->active_sheet)))].name, sizeof(Sheet::name));
+        lcd_encoder = menuData->name[0];
+        menuData->initialized = true;
+    }
+    if (lcd_encoder < '\x20') lcd_encoder = '\x20';
+    if (lcd_encoder > '\x7F') lcd_encoder = '\x7F';
+
+    menuData->name[menuData->selected] = lcd_encoder;
+    lcd_set_cursor(0,0);
+    for (uint_least8_t i = 0; i < sizeof(Sheet::name); ++i)
+    {
+        lcd_putc(menuData->name[i]);
+    }
+    lcd_set_cursor(menuData->selected, 1);
+    lcd_putc('^');
+    if (lcd_clicked())
+    {
+        if ((menuData->selected + 1u) < sizeof(Sheet::name))
+        {
+            lcd_encoder = menuData->name[++(menuData->selected)];
+        }
+        else
+        {
+            eeprom_update_block(menuData->name,
+                EEPROM_Sheets_base->s[(eeprom_read_byte(&(EEPROM_Sheets_base->active_sheet)))].name,
+                sizeof(Sheet::name));
+            menu_back();
+        }
+    }
+}
+
 static void lcd_sheet_menu()
 {
     MENU_BEGIN();
     MENU_ITEM_BACK_P(_T(MSG_MAIN));
-    MENU_ITEM_SUBMENU_P(_i("Select"), lcd_select_sheet_menu);
+    MENU_ITEM_SUBMENU_P(_i("Select"), lcd_select_sheet_menu); //// c=18
+    MENU_ITEM_SUBMENU_P(_i("Rename"), lcd_rename_sheet_menu); //// c=18
 
     MENU_END();
 }