Using font awesome in WYSIWYG block

[Sonya*]

I would like to use some font awesome icons in WYSIWYG block. I have added them via HTML source:

Lorum ipsum <i class="fa fa-users"></i> lorum

It shows as expected. If I open the block for edit, the icons are removed. I have tried to add the classes fa and fa-users to Allowed CSS classes in the editor settings. It does not help. Is there any way to use icons in WYSIWYG block?

[Nathan Explosion]

<i class="fa fa-users">&nbsp;</i>

 

[Sonya*]