bug#2846:编辑器点击打开表情，选择相关表情后，弹出的表情选择框没有自动关闭

public/assets/kindeditor/plugins/emoticons/emoticons.js

@@ -13,6 +13,7 @@ KindEditor.plugin('emoticons', function(K) {
 		allowPreview = self.allowPreviewEmoticons === undefined ? true : self.allowPreviewEmoticons,
 		currentPageNum = 1;
 	self.clickToolbar(name, function() {
+		this.edit.focus();//如果没有这句 火狐下取不到焦点 导致_getSel()为空 报错 
 		var rows = 5, cols = 9, total = 135, startNum = 0,
 			cells = rows * cols, pages = Math.ceil(total / cells),
 			colsHalf = Math.floor(cols / 2),