选择图片时总是打开安装的目录, 附件, save as

https://github.com/leanote/desktop-app/issues/62

node_modules/gui.js

@@ -7,7 +7,7 @@ var gui = {
 	Menu: Menu,
 	MenuItem: MenuItem,
 	remote: remote,
-
+	app: remote.require('app'),
 	dialog: dialog,
 
 	getSeparatorMenu: function() {

public/js/app/native.js

@@ -118,7 +118,7 @@ function Menu() {
             		downloadImgPath = curPath;
 
             		// title不能设置
-            		gui.dialog.showSaveDialog(gui.getCurrentWindow(), {title: name, defaultPath: name}, function(targetPath) {
+            		gui.dialog.showSaveDialog(gui.getCurrentWindow(), {title: name, defaultPath: gui.app.getPath('userDesktop') + '/' + name}, function(targetPath) {
             			if(targetPath) {
 
             				FileService.download(curPath, targetPath, function(ok, msg) {

public/js/app/note.js

@@ -2304,7 +2304,7 @@ var Attach = {
 			var attachId = $li.data("id");
 			var title = $li.find('.attach-title').text();
 
-			gui.dialog.showSaveDialog(gui.getCurrentWindow(), {title: title, defaultPath: title}, function(targetPath) {
+			gui.dialog.showSaveDialog(gui.getCurrentWindow(), {title: title, defaultPath: gui.app.getPath('userDesktop') + '/' + title}, function(targetPath) {
     			if(targetPath) {
 					var curAttach = me.getAttach(attachId);
 					if(curAttach) {
@@ -2364,6 +2364,7 @@ var Attach = {
 		$('#chooseFile').click(function() {
 			gui.dialog.showOpenDialog(gui.getCurrentWindow(),
 				{
+					defaultPath: gui.app.getPath('userDesktop'),
 					properties: ['openFile', 'multiSelections']
 				},
 				function(paths) {

public/js/common.js

@@ -474,10 +474,12 @@ function pasteImage(e) {
 }
 
 // 插入本地图片
+// tinymce image插件调用
 function insertLocalImage() {
 	gui.dialog.showOpenDialog(gui.getCurrentWindow(), 
 		{
 			properties: ['openFile', 'multiSelections'],
+			defaultPath: gui.app.getPath('userDesktop'),
 			filters: [
 				{ name: 'Images', extensions: ['jpg', 'jpeg', 'png', 'gif', 'bmp'] }
 			]