toast style improvement

Current feature toast popups use a style copied from notification.

Notification popups have a lot of padding ( padding: 32px 16px 32px 56px; in iceblue, but older themes also have a lot of padding)

Since toast is stackable, it makes more sense to remove the padding for the toast popups.

for example, the following provide a much more compact and usable toast notification:
 

.z-toast-content {
    padding: 10px 16px 10px 56px;
    min-height: auto;
}