Prevent the amount from resetting when clicking "Donate"

I don't understand why it was broken but this fixes it.

wiki/src/donate.html

@@ -155,7 +155,9 @@
     link="no" class="paypal-inline" alt="PayPal"]] account.
   </div>
 
-  <button id="donate-paypal-button" class="btn btn-primary btn-lg btn-block">Donate</button>
+  <div id="donate-paypal-button">
+    <button class="btn btn-primary btn-lg btn-block col-md-12">Donate</button>
+  </div>
 
 </form>