PageDown PageUp don't change if caret still on screen

src/text_editor/window.cpp

@@ -470,5 +470,8 @@ void MoveCursorByPageSize(Window *window, int direction, bool shift = false) {
         }
     }
 
-    SetStoredOffsetFromTop(window, is_on_screen_res);
+    IsOnScreenResult r = IsMainCaretOnScreen(window);
+    if (!r.caret_on_screen) {
+        SetStoredOffsetFromTop(window, is_on_screen_res);
+    }
 }