Snapshots displays while select version

The bug

How you can see, i only have selected the Releases option to shown when i select a version.

Now, when i want to create an installation, in the list of versions there are snapshots and releases.

I think that only releases have to appear, but not snapshots.

Steps to Reproduce:
1. Only select the "Releases" option in installations.
2. Go to "New installation" and click on the "version" option
3. And you will see that displays both snapshots and versions