NickNameDialog: Use click() instead of animateClick()

Change-Id: Ic4d516cbf4aadb70d44ec6b1d167d81f1592b1dd
Reviewed-by: Eike Ziller <eike.ziller@digia.com>
NickNameDialog: Use Utils::TreeView

Change-Id: I9db7b144288bf5d550544b406be8525fd8308f5d
Reviewed-by: Eike Ziller <eike.ziller@digia.com>