[ui] UI enhancements and activation Bug fix

- fix permission list placement in the anonymous ID preference page
- rename advanced button to configure
- flush activation preference
- improved heartbeat intervals description

Change-Id: I1320521669f52a6a90c51687416d1fd871892c97
Signed-off-by: Yasser Aziza <yasser.aziza@gmail.com>
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Signed-off-by: Yasser Aziza <yasser.aziza@gmail.com>