message: Mark skins with const
diff: @@ -67,6 +67,9 @@ private:
  void updateCursor();
  private:
  + const NAS2D::RectangleSkin mSkinNormal;
  + const NAS2D::RectangleSkin mSkinFocus;
  +
  NAS2D::Timer mCursorTimer; /**< Timer for the cursor blink. */
  int mCursorPosition = 0; /**< Position of the Insertion Cursor. */
  @@ -77,9 +80,6 @@ private:
  BorderVisibility mBorderVisibility = BorderVisibility::FOCUS_ONLY; /**< Border visibility flag. */
  - NAS2D::RectangleSkin mSkinNormal;
  - NAS2D::RectangleSkin mSkinFocus;
  -
  bool mEditable = true; /**< Toggle editing of the field. */
  bool mShowCursor = true; /**< Flag indicating whether or not to draw the cursor. */
  bool mNumbersOnly = false; /**< Flag indicating that only numerals should be used */
  