Remove plugin preferences

Make sure when a GncMainWindow closes that the preference callbacks
that were setup for the plugins are removed. At this point the actions
are not touched as it causes errors to be logged to the terminal.

gnucash/gnome-utils/gnc-main-window.c

@@ -2747,6 +2747,7 @@ gnc_main_window_new (void)
     active_windows = g_list_append (active_windows, window);
     gnc_main_window_update_title(window);
     window->window_quitting = FALSE;
+    window->just_plugin_prefs = FALSE;
 #ifdef MAC_INTEGRATION
     gnc_quartz_set_menu(window);
 #else
@@ -3115,6 +3116,15 @@ gnc_main_window_close_page (GncPluginPage *page)
     priv = GNC_MAIN_WINDOW_GET_PRIVATE(window);
     if (priv->installed_pages == NULL)
     {
+        GncPluginManager *manager = gnc_plugin_manager_get ();
+        GList *plugins = gnc_plugin_manager_get_plugins (manager);
+
+        /* remove only the preference callbacks from the window plugins */
+        window->just_plugin_prefs = TRUE;
+        g_list_foreach (plugins, gnc_main_window_remove_plugin, window);
+        window->just_plugin_prefs = FALSE;
+        g_list_free (plugins);
+
         /* remove the preference callbacks from the main window */
         gnc_main_window_remove_prefs (window);
 

gnucash/gnome-utils/gnc-main-window.h

@@ -58,6 +58,7 @@ typedef struct GncMainWindow
     GtkUIManager *ui_merge; /**< A pointer to the UI Manager data
                                  structure for the whole window. */
     gboolean window_quitting; /**< Set to TRUE when quitting from this window. */
+    gboolean just_plugin_prefs; /**< Just remove preferences only from plugins */
 } GncMainWindow;
 
 /** The class data structure for a main window object. */

gnucash/gnome-utils/gnc-plugin-menu-additions.c

@@ -474,7 +474,8 @@ gnc_plugin_menu_additions_remove_from_window (GncPlugin *plugin,
     /* Have to remove our actions manually. Its only automatic if the
      * actions name is installed into the plugin class. */
     group = gnc_main_window_get_action_group(window, PLUGIN_ACTIONS_NAME);
-    if (group)
+
+    if (group && !window->just_plugin_prefs)
         gtk_ui_manager_remove_action_group(window->ui_merge, group);
 
     /* Note: This code does not clean up the per-callback data structures

gnucash/gnome-utils/gnc-plugin.c

@@ -201,7 +201,7 @@ gnc_plugin_remove_from_window (GncPlugin *plugin,
     /*
      * Update window to remove UI items
      */
-    if (klass->actions_name)
+    if (klass->actions_name && !window->just_plugin_prefs)
     {
         DEBUG ("%s: %d actions to unmerge",
                klass->actions_name, (klass->n_actions + klass->n_toggle_actions));