!16 修复-截图保存时，会先跳转到最近保存的路径，然后又跳回图片路径

Merge pull request !16 from Ginhou/fix-savedialog-path

src/utils/mysavedialog.cpp

@@ -24,11 +24,10 @@
 #include "src/utils/filenamehandler.h"
 
 MySaveDialog::MySaveDialog(QWidget *parent) :
-    QFileDialog(parent)
+    QFileDialog(parent, QString(), QStandardPaths::standardLocations(QStandardPaths::PicturesLocation).at(0))
 {
     // setWindowIcon(QIcon::fromTheme("kylin-screenshot"));
     setNameFilter(QLatin1String(" PNG(*.png);;BMP(*.bmp);;JPEG(*.jpg)"));
-    setDirectory(QStandardPaths::standardLocations(QStandardPaths::PicturesLocation).at(0));
     setAcceptMode(QFileDialog::AcceptSave);
     setDefaultSuffix("png");
     setLabelText(QFileDialog::Reject, tr("Cancel"));