webui: help style update

one/static/style/base.less

@@ -316,13 +316,17 @@ body > footer {
     p {
         margin-top: 20px;
     }
-    p.teacher {
+    .teacher {
         background: #ddd;
         padding: 20px;
         border-left-width: 3px;
         border-left-style: solid;
         border-left-color: #0b4599;
     }
+    .teacher + .teacher {
+        margin-top: 0;
+        padding-top: 0;
+    }
     h4 {
         margin: 0;
         padding: 0;

one/static/style/box.less

@@ -633,8 +633,8 @@ table {
     .boxhelp-box {
         color:#000;
         position: absolute;
-        left: -100px;
         width: 500px;
+        max-width: 100%;
         z-index: 1000000;
         font-size: .7em;
         background-color: #ffc;