Login: fix Footer to be visible (#19147)

public/sass/components/_footer.scss

@@ -49,6 +49,7 @@
 // Keeping footer inside the graphic on Login screen
 .login-page {
   .footer {
+    display: block;
     bottom: $spacer;
     position: absolute;
     padding: $space-md 0 $space-md 0;