GCodeWorkShop: update the about message

Author: u-235

gcodeworkshop/src/gcodeworkshop.cpp

@@ -1261,6 +1261,14 @@ void GCodeWorkShop::about()
 	                      "<P>Version: %1"
 	                      "<P>Copyright (C) 1998 - 2018 by <a href=\"mailto:artkoz78@gmail.com\">Artur Kozioł</a>"
 	                      "<br>Copyright (C) 2020 - 2024 by <a href='mailto:nicegorov@yandex.ru'>Nick Egorrov</a>"
+	                      "<h2>Sources and updates</h2>"
+	                      "<p>Source code and new releases are available at the following addresses:"
+	                      "<ul>"
+	                      "<li><a href='https://github.com/GCodeProjects/GCodeWorkShop'>https://github.com/GCodeProjects/GCodeWorkShop</a></li>"
+	                      "<li><a href='https://codeberg.org/u-235/GCodeWorkShop'>https://codeberg.org/u-235/GCodeWorkShop</a></li>"
+	                      "<li><a href='https://gitflic.ru/project/u-235/gcodeworkshop'>https://gitflic.ru/project/u-235/gcodeworkshop</a></li>"
+	                      "</ul>"
+	                      "<h2>Thanks</h2>"
 	                      "<P>Spanish translation, fixes and other help thanks to Otto Huamani"
 	                      "<br />Catalan translation and deb package thanks to Jordi Sayol i Salomó"
 	                      "<br />German translation and other fixes thanks to Michael Numberger"
@@ -1269,8 +1277,8 @@ void GCodeWorkShop::about()
 	                      "<br />Dutch translation thanks to Henk van Andel"
 	                      "<br />OS X patch and other updates thanks to Janne Mäntyharju"
 	                      "<P>New EdytorNC icon thanks to Jakub Gajewski"
-	                      "<P><a href='https://github.com/GCodeProjects/GCodeWorkShop'>GCodeWorkShop on GitHub</a>"
 	                      "<P>GCodeWorkShop contains pieces of code from other Open Source projects."
+	                      "<h2>License</h2>"
 	                      "<P><i>GCodeWorkShop 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"