xsettings: add setting to enable/disable primary paste from middlemouse

Author: lukefromdc

plugins/xsettings/msd-xsettings-manager.c

@@ -217,6 +217,8 @@ static TranslationEntry translations [] = {
         { INTERFACE_SCHEMA, "show-input-method-menu", "Gtk/ShowInputMethodMenu",       translate_bool_int },
         { INTERFACE_SCHEMA, "show-unicode-menu",      "Gtk/ShowUnicodeMenu",           translate_bool_int },
         { INTERFACE_SCHEMA, "automatic-mnemonics",    "Gtk/AutoMnemonics",             translate_bool_int },
+        {INTERFACE_SCHEMA, "gtk-enable-primary-paste", "Gtk/EnablePrimaryPaste",
+translate_bool_int },
         { INTERFACE_SCHEMA, "gtk-enable-animations",  "Gtk/EnableAnimations",          translate_bool_int },
         { INTERFACE_SCHEMA, "gtk-dialogs-use-header", "Gtk/DialogsUseHeader",          translate_bool_int },