gplugin/gplugin

Use windows subsystem for GTK viewer

6 months ago, Elliott Sales de Andrade
80064de29bcd
Use windows subsystem for GTK viewer

This stops a console window from popping up if you run the viewer directly (from Explorer or a shortcut, etc.)

Also, modernize the `GOptionEntry` list.

Testing Done:
Compiled on Windows, and opened the viewer from Explorer.

Reviewed at https://reviews.imfreedom.org/r/2819/
The following individuals have contributed to this project.
Ankit Vani <a@nevitus.org>
EionRobb <eion@robbmob.com>
Elliott Sales de Andrade <quantum.analyst@gmail.com>
Gary Kramlich <grim@reaperworld.com>
Jason Scherer <schereja@gmail.com>
John Bailey <rekkanoryo@rekkanoryo.org>
Mike Ruprecht <cmaiku@gmail.com>
Olaf Hering <olaf@aepfle.de>
Paul Jimenez <pj@place.org>
Richard Laager <rlaager@pidgin.im>
Sorvival <sorvival@tutanota.com>
ivanhoe <ivanhoe@fiscari.de>