Fix some LVGL bugs (#19904)

Marlin/src/lcd/extui/lib/mks_ui/SPI_TFT.h

  */
 #pragma once
 
-#include "../../inc/MarlinConfigPre.h"
+#include "../../../../inc/MarlinConfigPre.h"
 
 #if HAS_TFT_LVGL_UI
 

Marlin/src/lcd/extui/lib/mks_ui/draw_about.cpp

 
 void lv_draw_about(void) {
   scr = lv_screen_create(ABOUT_UI);
-
-  // Create an Image button
-  lv_obj_t *buttonBack = lv_imgbtn_create(scr, "F:/bmp_return.bin", BTN_X_PIXEL * 3 + INTERVAL_V * 4, BTN_Y_PIXEL + INTERVAL_H + titleHeight, event_handler, ID_A_RETURN);
-  #if HAS_ROTARY_ENCODER
-    if (gCfgItems.encoder_enable) lv_group_add_obj(g, buttonBack);
-  #endif
-
-  // Create a label on the image button
-  lv_obj_t *label_Back = lv_label_create_empty(buttonBack);
-
-  if (gCfgItems.multiple_language) {
-    lv_label_set_text(label_Back, common_menu.text_back);
-    lv_obj_align(label_Back, buttonBack, LV_ALIGN_IN_BOTTOM_MID, 0, BUTTON_TEXT_Y_OFFSET);
-  }
+  lv_big_button_create(scr, "F:/bmp_return.bin", common_menu.text_back, BTN_X_PIXEL * 3 + INTERVAL_V * 4, BTN_Y_PIXEL + INTERVAL_H + titleHeight, event_handler, ID_A_RETURN);
 
   //fw_version = lv_label_create(scr, SHORT_BUILD_VERSION);
   //lv_obj_align(fw_version, nullptr, LV_ALIGN_CENTER, 0, -60);

Marlin/src/lcd/extui/lib/mks_ui/draw_dialog.cpp

   uiCfg.dialogType = type;
   scr = lv_screen_create(DIALOG_UI);
 
-  lv_obj_t *labelDialog = lv_label_create_empty(scr);
+  lv_obj_t *labelDialog = lv_label_create(scr, "");
 
   if (DIALOG_IS(TYPE_FINISH_PRINT, PAUSE_MESSAGE_RESUME)) {
       btnOk = lv_button_btn_create(scr, BTN_OK_X + 90, BTN_OK_Y, 100, 50, btn_ok_event_cb);

Marlin/src/lcd/extui/lib/mks_ui/draw_print_file.cpp

 void lv_draw_print_file(void) {
   //uint8_t i;
   uint8_t file_count;
-  if (disp_state_stack._disp_state[disp_state_stack._disp_index] != PRINT_FILE_UI) {
-    disp_state_stack._disp_index++;
-    disp_state_stack._disp_state[disp_state_stack._disp_index] = PRINT_FILE_UI;
-  }
-  disp_state = PRINT_FILE_UI;
 
   curDirLever = 0;
   dir_offset[curDirLever].curPage = 0;
 void disp_gcode_icon(uint8_t file_num) {
   uint8_t i;
 
-  scr = lv_screen_create(MAIN_UI, "");
+  scr = lv_screen_create(PRINT_FILE_UI, "");
 
   // Create image buttons
   buttonPageUp   = lv_imgbtn_create(scr, "F:/bmp_pageUp.bin", OTHER_BTN_XPIEL * 3 + INTERVAL_V * 4, titleHeight, event_handler, ID_P_UP);

Marlin/src/lcd/extui/lib/mks_ui/draw_ui.cpp

     disp_state_stack._disp_state[disp_state_stack._disp_index] = newScreenType;
   }
   disp_state = newScreenType;
-  lv_refr_now(lv_refr_get_disp_refreshing());
 
   // title
   lv_obj_t *titleLabel = nullptr;
   if (titleLabel)
     lv_obj_set_style(titleLabel, &tft_style_label_rel);
 
+  lv_refr_now(lv_refr_get_disp_refreshing());
+
   return scr;
 }
 
 // Create an empty label
 lv_obj_t* lv_label_create_empty(lv_obj_t *par) {
-  return lv_label_create(par, (lv_obj_t*)nullptr);
+  lv_obj_t *label = lv_label_create(par, (lv_obj_t*)nullptr);
+  return label;
 }
 
 // Create a label with style and text
 lv_obj_t* lv_label_create(lv_obj_t *par, const char *text) {
   lv_obj_t *label = lv_label_create_empty(par);
   if (text) lv_label_set_text(label, text);
+  lv_obj_set_style(label, &tft_style_label_rel);
   return label;
 }
 

Marlin/src/lcd/extui/lib/mks_ui/draw_ui.h

   #include "draw_wifi_tips.h"
 #endif
 
-#include "../../inc/MarlinConfigPre.h"
+#include "../../../../inc/MarlinConfigPre.h"
 #define FILE_SYS_USB  0
 #define FILE_SYS_SD 1
 

Marlin/src/lcd/extui/lib/mks_ui/tft_lvgl_configuration.cpp

 #include "../../../../MarlinCore.h"
 #include "../../../../inc/MarlinConfig.h"
 
-#include HAL_PATH(../../HAL, tft/xpt2046.h)
+#include HAL_PATH(../../../../HAL, tft/xpt2046.h)
 #include "../../../marlinui.h"
 XPT2046 touch;
 

Marlin/src/lcd/extui/lib/mks_ui/wifi_module.h

   extern "C" { /* C-declarations for C++ */
 #endif
 
-#include "../../inc/MarlinConfigPre.h"
+#include "../../../../inc/MarlinConfigPre.h"
 
 #include <math.h>
 #include <stdio.h>