Samegame highscore keeps last player's name, but not lineedit's size

When you play samegame from Qt Demo and enter the highscore name, the lineedit resizes to fit the name, but if you play the game again the name of the last player appears on the lineedit when entering the highscore, but the lineedit is not resized to fit the name, so the name can overflow the linedit width.

I think the simplest solution is just to reset the player's name when starting a new game.