Add support for batch install to NAND

This adds support to batch install files to NAND

src/yuzu/install_dialog.cpp

@@ -0,0 +1,72 @@
+// Copyright 2020 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#include <QCheckBox>
+#include <QDialogButtonBox>
+#include <QFileInfo>
+#include <QHBoxLayout>
+#include <QLabel>
+#include <QListWidget>
+#include <QVBoxLayout>
+#include "yuzu/install_dialog.h"
+#include "yuzu/uisettings.h"
+
+InstallDialog::InstallDialog(QWidget* parent, const QStringList& files) : QDialog(parent) {
+    file_list = new QListWidget(this);
+
+    for (const QString& file : files) {
+        QListWidgetItem* item = new QListWidgetItem(QFileInfo(file).fileName(), file_list);
+        item->setData(Qt::UserRole, file);
+        item->setFlags(item->flags() | Qt::ItemIsUserCheckable);
+        item->setCheckState(Qt::Checked);
+    }
+
+    file_list->setMinimumWidth((file_list->sizeHintForColumn(0) * 6) / 5);
+
+    vbox_layout = new QVBoxLayout;
+
+    hbox_layout = new QHBoxLayout;
+
+    description = new QLabel(tr("Please confirm these are the files you wish to install."));
+
+    overwrite_files = new QCheckBox(tr("Overwrite Existing Files"));
+    overwrite_files->setCheckState(Qt::Unchecked);
+
+    buttons = new QDialogButtonBox;
+    buttons->addButton(QDialogButtonBox::Cancel);
+    buttons->addButton(tr("Install"), QDialogButtonBox::AcceptRole);
+
+    connect(buttons, &QDialogButtonBox::accepted, this, &InstallDialog::accept);
+    connect(buttons, &QDialogButtonBox::rejected, this, &InstallDialog::reject);
+
+    hbox_layout->addWidget(overwrite_files);
+    hbox_layout->addWidget(buttons);
+
+    vbox_layout->addWidget(description);
+    vbox_layout->addWidget(file_list);
+    vbox_layout->addLayout(hbox_layout);
+
+    setLayout(vbox_layout);
+    setWindowFlags(windowFlags() & ~Qt::WindowContextHelpButtonHint);
+    setWindowTitle(tr("Install Files to NAND"));
+}
+
+InstallDialog::~InstallDialog() = default;
+
+QStringList InstallDialog::GetFilenames() const {
+    QStringList filenames;
+
+    for (int i = 0; i < file_list->count(); ++i) {
+        const QListWidgetItem* item = file_list->item(i);
+        if (item->checkState() == Qt::Checked) {
+            filenames.append(item->data(Qt::UserRole).toString());
+        }
+    }
+
+    return filenames;
+}
+
+bool InstallDialog::ShouldOverwriteFiles() const {
+    return overwrite_files->isChecked();
+}