tdf#89070 Table filter dialog: properly initialise OTableTreeListBox

regression from .ui conversion:

commit 5c72a213
Author: Caolán McNamara <caolanm@redhat.com>
Date:   Tue Jan 21 14:41:16 2014 +0000

    convert table filter page to .ui

    Change-Id: I7bfb7698e2a5303b492766fba564c7b9033bcc52

Change-Id: Ic7d41d64d4c15eabf7b7f83a17482c473154434a

dbaccess/source/ui/dlg/tablespage.cxx

@@ -79,6 +79,7 @@ namespace dbaui
         get(m_pTables, "TablesFilterPage");
 
         get(m_pTablesList, "treeview");
+        m_pTablesList->init(true);
         m_pTablesList->set_width_request(56 * m_pTablesList->approximate_char_width());
         m_pTablesList->set_height_request(12 * m_pTablesList->GetTextHeight());