StillImageCamera: fix multiple prompt

src/citra_qt/camera/still_image_camera.cpp

@@ -13,6 +13,10 @@ namespace Camera {
 StillImageCamera::StillImageCamera(QImage image_, const Service::CAM::Flip& flip)
     : QtCameraInterface(flip), image(std::move(image_)) {}
 
+StillImageCamera::~StillImageCamera() {
+    StillImageCameraFactory::last_path.clear();
+}
+
 void StillImageCamera::StartCapture() {}
 
 void StillImageCamera::StopCapture() {}
@@ -25,7 +29,12 @@ bool StillImageCamera::IsPreviewAvailable() {
     return !image.isNull();
 }
 
+std::string StillImageCameraFactory::last_path;
+
 const std::string StillImageCameraFactory::GetFilePath() const {
+    if (!last_path.empty()) {
+        return last_path;
+    }
     QList<QByteArray> types = QImageReader::supportedImageFormats();
     QList<QString> temp_filters;
     for (QByteArray type : types) {
@@ -33,8 +42,9 @@ const std::string StillImageCameraFactory::GetFilePath() const {
     }
 
     QString filter = QObject::tr("Supported image files (%1)").arg(temp_filters.join(" "));
-    return QFileDialog::getOpenFileName(nullptr, QObject::tr("Open File"), ".", filter)
-        .toStdString();
+    last_path =
+        QFileDialog::getOpenFileName(nullptr, QObject::tr("Open File"), ".", filter).toStdString();
+    return last_path;
 }
 
 std::unique_ptr<CameraInterface> StillImageCameraFactory::Create(const std::string& config,