Game selector panel fixes: update button text (#12771)

The button text was updated recently with the mistaken thought
the buttons only appeared in bot servers. The buttons actually
show up in all cases (single game, hosted game, bot game),
hence "upload save game" does not make sense in all of those context.

game-app/game-core/src/main/java/games/strategy/engine/framework/startup/ui/panels/main/game/selector/GameSelectorPanel.java

@@ -56,12 +56,12 @@ public final class GameSelectorPanel extends JPanel implements Observer {
   private final JButton loadNewGame =
       new JButtonBuilder()
           .title("Select Game")
-          .toolTip("Start a new game or load an autosave from the host server.")
+          .toolTip("Start a new game (autosaves on bot servers will appear here)")
           .build();
 
   private final JButton loadSavedGame =
       new JButtonBuilder()
-          .title("Upload Saved Game")
+          .title("Saved Game")
           .toolTip("Open a game saved on your computer.")
           .build();