Add System Settings page.

src/main/twirl/admin/system.scala.html

@@ -0,0 +1,28 @@
+@(settings: service.SystemSettingsService.SystemSettings)(implicit context: app.Context)
+@import context._
+@import view.helpers._
+@html.main("System Settings"){
+  @menu("system"){
+    <form action="@path/admin/system" method="POST" validate="true">
+      <div class="box">
+        <div class="box-header">System Settings</div>
+        <div class="box-content">
+          <label><strong>Account registration</strong></label>
+          <fieldset>
+            <label>
+              <input type="radio" name="allowAccountRegistration" value="true"@if(settings.allowAccountRegistration){ checked}>
+              <strong>Allow</strong> - Users can create account by themselves.
+            </label>
+            <label>
+              <input type="radio" name="allowAccountRegistration" value="false"@if(!settings.allowAccountRegistration){ checked}>
+              <strong>Deny</strong> - Only administrators can create account.
+            </label>
+          </fieldset>
+        </div>
+      </div>
+      <fieldset>
+        <input type="submit" class="btn btn-success" value="Apply changes"/>
+      </fieldset>
+    </form>
+  }
+}