display name when available instead of email in header

web/themes/custom/materiotheme/assets/styles/main.scss

@@ -793,6 +793,9 @@ aside.messages{
 #content-left{
   z-index: 5;
   box-sizing: content-box;
+
+  position:fixed;
+
   max-width:1px;
   overflow-x: hidden;
   transition: all 0.3s ease-in-out;