* Revert "Fix some icon names changed by the Font Awesome 5. (#8796)"
This reverts commit c8a1e945d9.
* Revert "Migrate to font-awesome 5.0. (#8799)"
This reverts commit ae20afbc80.
* Revert "Fix some icons names, unavailable in fontawesome5 (free license). (#8792)"
This reverts commit 30b1bb0704.
* Revert "Update the icon name changed by the Font Awesome 5. (#8776)"
This reverts commit 84bcf89764.
* Revert "Add bot icon to bot avatars and migrate to newer version of Font Awesome (#8484)"
This reverts commit cc784f3c16.