Added initial open file paths configuration

src/GUI/dirselectwidget.cpp

@@ -0,0 +1,42 @@
+#include <QPushButton>
+#include <QToolButton>
+#include <QFileDialog>
+#include <QHBoxLayout>
+#include <QFileInfo>
+#include <QFontMetrics>
+#include <QApplication>
+#include "dirselectwidget.h"
+
+DirSelectWidget::DirSelectWidget(QWidget *parent) : QWidget(parent)
+{
+	QFontMetrics fm(QApplication::font());
+	_edit = new QLineEdit();
+	_edit->setMinimumWidth(fm.averageCharWidth() * (QDir::homePath().length()
+	  + 12));
+#ifdef Q_OS_WIN32
+	_button = new QPushButton("...");
+	_button->setMaximumWidth(_button->sizeHint().width() / 2);
+#else // Q_OS_WIN32
+	_button = new QToolButton();
+	_button->setText("...");
+#endif // Q_OS_WIN32
+	connect(_button, &QToolButton::clicked, this, &DirSelectWidget::browse);
+
+	QHBoxLayout *layout = new QHBoxLayout();
+	layout->setContentsMargins(QMargins());
+	layout->addWidget(_edit);
+	layout->addWidget(_button);
+	setLayout(layout);
+
+	QSizePolicy p(QSizePolicy::MinimumExpanding, QSizePolicy::Fixed);
+	setSizePolicy(p);
+}
+
+void DirSelectWidget::browse()
+{
+	QString dir(QFileDialog::getExistingDirectory(this, tr("Select directory"),
+	  _edit->text()));
+
+	if (!dir.isEmpty())
+		_edit->setText(dir);
+}