Increase default size of main window

The average size of screen increases over time.

tryton/tryton/config.py

@@ -69,7 +69,7 @@ class ConfigManager(object):
             'bug.url': 'https://bugs.tryton.org/',
             'download.url': 'https://downloads-cdn.tryton.org/',
             'download.frequency': 60 * 60 * 8,
-            'menu.pane': 200,
+            'menu.pane': 320,
         }
         self.config = {}
         self.options = {}

tryton/tryton/gui/main.py

@@ -125,7 +125,7 @@ class Main(Gtk.Application):
             return
 
         self.window = Gtk.ApplicationWindow(application=self, title="Tryton")
-        self.window.set_default_size(960, 720)
+        self.window.set_default_size(1280, 960)
         self.window.maximize()
         self.window.set_position(Gtk.WindowPosition.CENTER)
         self.window.set_resizable(True)