Revert "Copyright text made visible (#750)" (#776)

This reverts commit ec138af.

Author: mariobehling

css/theme-lava.css

@@ -767,6 +767,7 @@ nav .container {
 .copy-text-bottom {
   left: 24px;
   bottom:25%;
+  bottom:40px;
   position: absolute;
 }
 .text-panel {