Fix spreadsheet history when no checkpoint

customize.dist/src/less2/include/toolbar-history.less

@@ -73,6 +73,9 @@
             .cp-history-timeline-actions {
                 margin-left: 21px !important;
             }
+            .cp-toolbar-history-actions {
+                align-items: baseline !important;
+            }
         }
         &.cp-smallpatch {
             .cp-history-snapshot {

www/common/onlyoffice/history.js

@@ -30,7 +30,8 @@ define([
             return hashes[a].index - hashes[b].index;
         });
 
-        var endWithCp = config.onlyoffice.lastHash === hashes[sortedCp[sortedCp.length - 1]].hash;
+        var endWithCp = sortedCp.length &&
+                        config.onlyoffice.lastHash === hashes[sortedCp[sortedCp.length - 1]].hash;
 
         var fillOO = function (id, messages) {
             if (!id) { return; }