Open toggleables by default

Fixes #8.

package.json

@@ -1,6 +1,6 @@
 {
     "name": "doomsday",
-    "version": "1.3.7",
+    "version": "1.3.8",
     "description": "Test your mastery of Conway's Doomsday rule.",
     "author": "Felix W. Dekker",
     "browser": "dist/bundle.js",
@@ -26,8 +26,8 @@
         "grunt-contrib-watch": "^1.1.0",
         "grunt-focus": "^1.0.0",
         "grunt-text-replace": "^0.4.0",
-        "grunt-webpack": "^3.1.3",
-        "webpack": "^4.43.0",
+        "grunt-webpack": "^4.0.2",
+        "webpack": "^4.44.1",
         "webpack-cli": "^3.3.12"
     }
 }

src/main/index.html

@@ -82,6 +82,6 @@
 
 
 <!-- Scripts -->
-<script src="bundle.js"></script>
+<script src="bundle.js?v=%%VERSION_NUMBER%%"></script>
 </body>
 </html>

src/main/js/index.js

@@ -213,7 +213,8 @@ class ToggleableSection {
      */
     _loadToggle() {
         const target = localStorage.getItem(`/tools/doomsday//toggle-${this._name}`);
-        if (target === undefined) {
+        if (target === null) {
+            this.setOpened(true);
             this._storeToggle();
             return;
         }