Rewrite terminaleditor with ui file.

Write terminal editor with ui file.
The terminalData::type of a terminal can be edited with the terminal
editor.

sources/properties/terminaldata.h

@@ -1,3 +1,20 @@
+/*
+	Copyright 2006-2021 The QElectroTech Team
+	This file is part of QElectroTech.
+
+	QElectroTech 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 of the License, or
+	(at your option) any later version.
+
+	QElectroTech 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 QElectroTech.  If not, see <http://www.gnu.org/licenses/>.
+*/
 #ifndef TERMINALDATA_H
 #define TERMINALDATA_H
 
@@ -18,13 +35,16 @@ class QGraphicsObject;
 */
 class TerminalData : public PropertiesInterface
 {
-		enum Type {
-			Generic,
-			TerminalInner,
-			TerminalOuter
-		};
+	Q_GADGET
 
 	public:
+		enum Type {
+			Generic,
+			Inner,
+			Outer
+		};
+		Q_ENUM(Type)
+
 		TerminalData();
 		TerminalData(QGraphicsObject* parent);
 		~TerminalData() override;