修复自定义指令lemon-contextmenu报错的问题

packages/components/message/text.vue

@@ -10,7 +10,7 @@ export default {
         props={{ ...this.$attrs }}
         scopedSlots={{
           content: props => {
-            const content = this.IMUI.replaceEmojiName(props.content);
+            const content = this.IMUI.emojiNameToImage(props.content);
             return <span domProps={{ innerHTML: content }} />;
           }
         }}
@@ -29,6 +29,8 @@ export default {
         height 18px
         display inline-block
         background transparent
+        position relative
+        top -1px
         padding 0 2px
         vertical-align middle
 </style>