Custom Css Style Drop Editor

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Hi there,

what about pseudo elements (:before and :after) in the custom css style field in drop editor? It does not work.
Same problem with predefined image styles.

Two example who does not work:

img.img-25-right{
width: 22%;
float: right;
margin: 0px 10px 0px 10px;
}

i.pdf::before {
font-family: FontAwesome;
content: "\f1c1";
margin-right: 8px;
color: #666666;}

It seems that the custom css style does not work for object styles or inline styles...

Can you help me?