优化编辑器操作助手;优化文章阅读样式；

public/static/css/index.articles.css

@@ -294,6 +294,13 @@ a.post-item:visited {
     font-size: 13px !important;
 }
 
+.ul-content code {
+    background-color: #f5f2f0;
+    border-radius   : 3px;
+    font-family     : monospace;
+    padding         : 3px;
+}
+
 .copyright {
     margin-top : 15px;
     padding-top: 20px;

view/admin/post/edit_content.html

@@ -163,6 +163,11 @@
                 type: 'editor'
             }
         }
+        editorConfig.hoverbarKeys = {
+            text: {
+                menuKeys: ['headerSelect', 'code', 'insertLink', 'bulletedList', '|', 'bold', 'through', 'color', 'bgColor', 'clearStyle']
+            }
+        }
         editorConfig.onChange = (editor) => {
             contentSaveLock = false;