* 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.
* Redesign landing page (again)
* Move login form in small version to the right column
* Display closed registrations message
* Add site setting for the hero image
* Fix test
* Increase spacing, maximum width, change call to action section
They were redundant, and also had a inconsistency; the button for
"other instances" had an icon for the external link in "more" page, but
it didn't in the other pages.
This unifies the implementation, and the external link icon is now shown
in all the about pages.
