Supporters of an idea are not updated after a vote

[oanalavinia]

Steps to reproduce:

1. Click on Ideas Application
2. Click 'Add new entry'
3. Fill an entry name
4. Fill the required fields
5. Click 'Save & View'
6. On the idea's page, click on voting buttons from "Votes" or "Supporters"/"Opponents" fields

Expected result:
Depending on the pressed button, the name of the user appears under "Supporters"/"Opponents" fields with the specific text "You support this idea"/"You are against this idea" inside the box.

Actual result:
Only after refreshing the page the user is able to see these changes.