Tests: fix creation of fake notifications

Signed-off-by: Christophe Chapuis <chris.chapuis@gmail.com>
Notifications: make so that the current maximized card gets resized correctly when notification area is resized

Signed-off-by: Christophe Chapuis <chris.chapuis@gmail.com>
Notifications: fixes for closeNotification

Signed-off-by: Christophe Chapuis <chris.chapuis@gmail.com>