Implement 1Password Vault Import

* Support importing 1Password vaults (.opvault folders) into KDBX database
* Entry attributes are filled based on section and field name
* Expiration dates are set for entries
* Entry URL's are set from a wider array of fields

src/gui/OpVaultOpenWidget.h

@@ -0,0 +1,34 @@
+/*
+ *  Copyright (C) 2019 KeePassXC Team <team@keepassxc.org>
+ *
+ *  This program is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation, either version 2 or (at your option)
+ *  version 3 of the License.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef KEEPASSXC_OPVAULTOPENWIDGET_H
+#define KEEPASSXC_OPVAULTOPENWIDGET_H
+
+#include "gui/DatabaseOpenWidget.h"
+
+class OpVaultOpenWidget : public DatabaseOpenWidget
+{
+    Q_OBJECT
+
+public:
+    explicit OpVaultOpenWidget(QWidget* parent = nullptr);
+
+protected:
+    void openDatabase() override;
+};
+
+#endif // KEEPASSXC_OPVAULTOPENWIDGET_H