fix(ui): style not refresh when toggling option for the fold button position

src/main/frontend/components/block.css

@@ -172,6 +172,11 @@
   }
 }
 
+.block-control-wrap {
+  height: 24px;
+  margin-top: 0;
+}
+
 .block-control, .block-control:hover {
   text-decoration: none;
   cursor: default;
@@ -523,6 +528,10 @@ a:hover > .bullet-container {
     display: none;
   }
 
+  .block-children {
+    border-left: none;
+  }
+
   .hide-inner-bullet .bullet {
     display: none;
   }