_ How can I stop users from deleting the notifications? just CSS it out?
If they're the User of the notification they effectively own the notification and can delete it. There is no way to disable this. Notifications they don't own can only be hidden (just implemented in latest build).
_How can I set the width of the qtip that shows the notifications? I wanted to set the width: 95pc using CSS but somehow I cannot find the width setting.
You can't without overriding the button template file for notifications and changing the width value in its tooltip usage.