Fixed lot's of memory leaks, for example, memory leak on reload, described

Fixed lot's of memory leaks, for example, memory leak on reload, described

       * shell/ev-page-action.c: (match_selected_cb),
        (display_completion_text), (match_completion), (update_model):
        * shell/ev-sidebar-links.c: (ev_sidebar_links_dispose),
        (expand_open_links):
        * shell/ev-sidebar.c: (ev_sidebar_destroy),
        (ev_sidebar_menu_item_activate_cb), (ev_sidebar_add_page),
        (ev_sidebar_set_document):
        * shell/ev-window.c: (ev_window_xfer_job_cb),
        (sidebar_widget_model_set), (sidebar_page_main_widget_update_cb):

        Fixed lot's of memory leaks, for example, memory leak on reload,
        described in bug 307793.