chatgui settings: add Database tab with integrity check (quick/full) and optimize

tools/chatgui/src/mainwindow.cpp

@@ -260,7 +260,7 @@ void MainWindow::showJoinDialog() {
 }
 
 void MainWindow::showSettings() {
-    SettingsDialog dlg(m_cfgPath, this);
+    SettingsDialog dlg(m_cfgPath, m_db, this);
     dlg.exec();
 }