Edit participants selector checks the user above the one I touch

[jaragunde]

Steps to reproduce:

1. Create a group or enter the administration of a group you created.
2. Press "Add" to add participants.
3. In the "Edit Participants" screen, when I touch a contact name the person that gets added is the one above.
   3.1. If the user I want to add is the last in a letter group (e.g. the last one starting by "A"), there is no way to add it.

I'm using the packaged version of Wazapp 0.9.22.