edit post style clean up

lms/static/sass/_discussion.scss

@@ -274,20 +274,23 @@ body.discussion {
     width: 100%;
     margin-bottom: 20px;
     @include clearfix;
+    @include box-sizing(border-box);
+
+    .form-row {
+      margin-top: 20px;
+    }
+
     .post-cancel {
       @include white-button;
-      border-color: #444;
       float: left;
       margin: 10px 0 0 15px;
     }
 
     .post-update {
-
       @include blue-button;
       float: left;
       height: 37px;
       margin-top: 10px;
-      border-color: #333;
       padding-bottom: 2px;
 
       &:hover {
@@ -301,13 +304,28 @@ body.discussion {
       padding: 0 10px;
       box-sizing: border-box;
       border-radius: 3px;
-      border: 1px solid #333;
+      border: 1px solid #aaa;
       font-size: 16px;
-      font-family: 'Open Sans', sans-serif;
+      font-family: $sans-serif;
       color: #333;
-      box-shadow: 0 1px 3px rgba(0, 0, 0, 0.3) inset;
+      box-shadow: 0 1px 3px rgba(0, 0, 0, 0.15) inset;
     }
 
+    .tagsinput {
+      padding: 10px;
+      @include box-sizing(border-box);
+      border: 1px solid #aaa;
+      border-radius: 3px;
+      background: #fff;
+      font-family: 'Monaco', monospace;
+      font-size: 13px;
+      line-height: 1.6;
+      box-shadow: 0 1px 3px rgba(0, 0, 0, 0.3) inset;
+
+      span.tag {
+        margin-bottom: 0;
+      }
+    }
   }
 
   .new-post-form {
@@ -2172,4 +2190,4 @@ body.discussion {
   .wmd-spacer3 {
     left: 300px;
   }
-}
+}