'When to daydream' dialog does not follow the JB dialog design guide

The dialog is a single selection popup and according to the
dialogs design guide the popup should close when the user
has make his/her choice, but in this case it does not.

Change-Id: Iac6bc19146a88236d3253d2d846212ce09b4925b
Remove "Enable widgets" checkbox from Face Unlock settings

It doesn't work anyway as we have a different option to control
widgets' behaviour.

Change-Id: I2f3c2b6f8f638c6c4d9d9c9b3cdb2facfef70039