Fix switching from large to small cursor in history

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

@@ -81,7 +81,8 @@
                 background: @pos-color;
             }
             .cp-history-timeline-pos {
-                border: none !important;
+                border-right: none;
+                border-left: none;
                 width: 2px !important;
                 background: @pos-color;
                 &:before {
@@ -192,8 +193,8 @@
             //background: @pos-color;
             position: absolute;
             &:before {
-                margin-top: -16px;
+                top: -17px;
-                font-size: 23px;
+                font-size: 24px;
                 position: absolute;
                 left: ~"calc(50% - 6px)";
             }