settings-manager: Make sure content determines size

Previously the window could be horizontally resized which would cut off
window content and insert a horizontal scrollbar. This is not the case
in any of our standalone settings dialogs and causes usability issues.
Therefore we now disable this scrollbar policy setting.
Signed-off-by: Sean Davis <smd.seandavis@gmail.com>

xfce4-settings-manager/xfce-settings-manager-dialog.c

@@ -329,7 +329,7 @@ xfce_settings_manager_dialog_init (XfceSettingsManagerDialog *dialog)
     /* pluggable dialog scrolled window and viewport */
     dialog->socket_scroll = scroll = gtk_scrolled_window_new (NULL, NULL);
     gtk_scrolled_window_set_shadow_type (GTK_SCROLLED_WINDOW (scroll), GTK_SHADOW_NONE);
-    gtk_scrolled_window_set_policy (GTK_SCROLLED_WINDOW (scroll), GTK_POLICY_AUTOMATIC, GTK_POLICY_AUTOMATIC);
+    gtk_scrolled_window_set_policy (GTK_SCROLLED_WINDOW (scroll), GTK_POLICY_NEVER, GTK_POLICY_AUTOMATIC);
     gtk_box_pack_start (GTK_BOX (dialog_vbox), scroll, TRUE, TRUE, 0);
     gtk_container_set_border_width (GTK_CONTAINER (scroll), 0);