Add functionality to Help buttons for opening URLs.

android/app/src/main/AndroidManifest.xml

@@ -42,5 +42,10 @@
             <action android:name="android.intent.action.PROCESS_TEXT"/>
             <data android:mimeType="text/plain"/>
         </intent>
+        <!-- Allow opening of web URLs -->
+        <intent>
+            <action android:name="android.intent.action.VIEW" />
+            <data android:scheme="https" />
+        </intent>
     </queries>
 </manifest>