Display win percentage

package.json

@@ -1,6 +1,6 @@
 {
     "name": "minesweeper",
-    "version": "0.81.6",
+    "version": "0.81.7",
     "description": "Just Minesweeper!",
     "author": "Felix W. Dekker",
     "browser": "dist/bundle.js",

src/main/js/Statistics.ts

@@ -198,11 +198,15 @@ export class LocalStatistics implements Statistics {
                 </tr>
                 <tr>
                     <th>Games completed</th>
-                    <td>${this.gamesWon}</td>
+                    <td>
+                        ${this.gamesWon}&nbsp;(${Math.round(100 * this.gamesWon / this.gamesStarted)}%)
+                    </td>
                 </tr>
                 <tr>
                     <th>Games completed without losing</th>
-                    <td>${this.gamesWonWithoutLosing}</td>
+                    <td>
+                        ${this.gamesWonWithoutLosing}&nbsp;(${Math.round(100 * this.gamesWonWithoutLosing / this.gamesStarted)}%)
+                    </td>
                 </tr>
             </table>