Set gtk-alternative-sort-arrows to false (#491)

Looks like it has been reversed in GTK4 (?), not sure.

The default behaviour should be:
🔽 -- descending
🔼 -- ascending

Author: stsdc

src/Monitor.vala

@@ -40,9 +40,6 @@ namespace Monitor {
 
             Appearance.set_prefered_style ();
 
-            // Controls the direction of the sort indicators
-            Gtk.Settings.get_default ().set ("gtk-alternative-sort-arrows", true, null);
-
             if (settings.get_boolean ("indicator-state")) {
                 held = true;
                 hold ();