This reverts commit 1e77a2df15.
Some references to the footer were not fixed, breaking the login method:
file:///usr/share/sddm/themes/breeze/Login.qml:65: ReferenceError: footer is not defined
It removed sessionButton which is still needed and referenced, which
also broke login:
file:///usr/share/sddm/themes/breeze/Main.qml:245: ReferenceError: sessionButton is not defined