PowerMenu: fix positionning of menu and add test button in Test framework

Signed-off-by: Christophe Chapuis <chris.chapuis@gmail.com>
BatteryService: add a test to avoid warning in test environment

Signed-off-by: Christophe Chapuis <chris.chapuis@gmail.com>
Tests: fix fake NotificationsListModel API

Signed-off-by: Christophe Chapuis <chris.chapuis@gmail.com>
Merge pull request #104 from webOS-ports/tofe/fixes

Tofe/fixes: some fixes for PowerMenu