Simplify G26 user_canceled

Marlin/src/gcode/bedlevel/G26.cpp

 #if ENABLED(NEWPANEL)
 
   /**
-   * Detect is_lcd_clicked, debounce it, and return true for cancel
+   * If the LCD is clicked, cancel, wait for release, return true
    */
   bool user_canceled() {
     if (!is_lcd_clicked()) return false; // Return if the button isn't pressed
-
-    #if ENABLED(ULTRA_LCD)
-      lcd_setstatusPGM(PSTR("Mesh Validation Stopped."), 99);
+    lcd_setstatusPGM(PSTR("Mesh Validation Stopped."), 99);
+    #if ENABLED(ULTIPANEL)
       lcd_quick_feedback();
     #endif
-
-    safe_delay(10);                      // Wait for click to settle
-    while (!is_lcd_clicked()) idle();    // Wait for button press again?
-
-    // If the button is suddenly pressed again,
-    // ask the user to resolve the issue
-    lcd_setstatusPGM(PSTR("Release button"), 99); // will never appear...
     wait_for_release();
-    lcd_reset_status();
     return true;
   }