Fix the backup button in anonymous drive

customize.dist/src/less/toolbar.less

@@ -768,6 +768,14 @@ body {
                 }
             }
         }
+        .cryptpad-backup {
+            margin: 0;
+            border-radius: 0;
+            background: transparent;
+            &:hover {
+                background-color: rgba(0,0,0,0.2);
+            }
+        }
     }
 }
 .cryptpad-toolbar-leftside {

customize.dist/toolbar.css

@@ -1290,6 +1290,14 @@ body.app-file .cryptpad-toolbar .dropdown-bar-content p .accountData {
 .cryptpad-toolbar-top .cryptpad-user .cryptpad-user-dropdown button span .fa {
   margin-left: 3px;
 }
+.cryptpad-toolbar-top .cryptpad-user .cryptpad-backup {
+  margin: 0;
+  border-radius: 0;
+  background: transparent;
+}
+.cryptpad-toolbar-top .cryptpad-user .cryptpad-backup:hover {
+  background-color: rgba(0, 0, 0, 0.2);
+}
 .cryptpad-toolbar-leftside {
   height: 32px;
   float: left;

www/drive/main.js

@@ -2753,7 +2753,7 @@ define([
             if (!APP.loggedIn) { $hist.hide(); }
 
             if (!readOnly && !APP.loggedIn) {
-                var $backupButton = Cryptpad.createButton('', true).removeClass('fa').removeClass('fa-question');
+                var $backupButton = Cryptpad.createButton('', true).removeClass('fa').removeClass('fa-question').addClass('cryptpad-backup');
                 $backupButton.append($backupIcon.clone().css('marginRight', '0px'));
                 $backupButton.attr('title', Messages.fm_backup_title);
                 $backupButton.on('click', function() {