Fix: title positioning on HiDPI displays

src/main_gui.cpp

@@ -248,8 +248,8 @@ struct MainWindow : Window
 		this->DrawWidgets();
 		if (_game_mode == GM_MENU) {
 			static const SpriteID title_sprites[] = {SPR_OTTD_O, SPR_OTTD_P, SPR_OTTD_E, SPR_OTTD_N, SPR_OTTD_T, SPR_OTTD_T, SPR_OTTD_D};
-			static const uint LETTER_SPACING = 10;
-			int name_width = (lengthof(title_sprites) - 1) * LETTER_SPACING;
+			uint letter_spacing = ScaleGUITrad(10);
+			int name_width = (lengthof(title_sprites) - 1) * letter_spacing;
 
 			for (uint i = 0; i < lengthof(title_sprites); i++) {
 				name_width += GetSpriteSize(title_sprites[i]).width;
@@ -257,8 +257,8 @@ struct MainWindow : Window
 			int off_x = (this->width - name_width) / 2;
 
 			for (uint i = 0; i < lengthof(title_sprites); i++) {
-				DrawSprite(title_sprites[i], PAL_NONE, off_x, 50);
-				off_x += GetSpriteSize(title_sprites[i]).width + LETTER_SPACING;
+				DrawSprite(title_sprites[i], PAL_NONE, off_x, ScaleGUITrad(50));
+				off_x += GetSpriteSize(title_sprites[i]).width + letter_spacing;
 			}
 		}
 	}