Multiple notifications and closure is not properly working

[Herrie82]

Add multiple toasts (4 or so), delete the 3rd one and remaining ones aren't in the right order.

I.e. created 1, 2, 3, 4. Deleted 3, remains 1, 2, 3 instead of 1, 2, 4. Might be solved by creating persistent ones, need to test.

[Herrie82]

Example:

luna-send -n 1 -f -a com.webos.app.test luna://com.webos.notification/createToast '{"message":"hello world 1","displayId": 0, "persistent":true}'
luna-send -n 1 -f -a com.webos.app.test luna://com.webos.notification/createToast '{"message":"hello world 2","displayId": 0, "persistent":true}'
luna-send -n 1 -f -a com.webos.app.test luna://com.webos.notification/createToast '{"message":"hello world 3","displayId": 0, "persistent":true}'
luna-send -n 1 -f -a com.webos.app.test luna://com.webos.notification/createToast '{"message":"hello world 4","displayId": 0, "persistent":true}'

Afterwards remove "hello world 3" and a random notification gets removed from the list it seems

[Tofee]

Thanks, with this scenario it should be easy to find the mistake