Remember last used path in file/directory picker

ui/utils/filepicker.h

@@ -0,0 +1,21 @@
+#pragma once
+
+
+#include <QFileDialog>
+
+QString customSaveFileDialog(const QString& title, const QString& defaultName, const QString& filter)
+{
+
+    static QString lastUsedPath;
+
+    QString selectedPath = QFileDialog::getSaveFileName(
+        Q_NULLPTR,
+        title,
+        lastUsedPath + defaultName,
+        filter);
+
+    if (!selectedPath.isNull())
+        lastUsedPath = selectedPath.mid(0, selectedPath.lastIndexOf('/', Qt::CaseInsensitive)+1);
+
+    return selectedPath;
+}