replaced hard function call with signal connection

Signed-off-by: Ettore Dreucci <ettore.dreucci@gmail.com>

src/gui/SearchWidget.cpp

@@ -119,7 +119,8 @@ void SearchWidget::databaseChanged(DatabaseWidget* dbWidget)
     if (dbWidget != nullptr) {
         // Set current search text from this database
         m_ui->searchEdit->setText(dbWidget->getCurrentSearch());
-
+        // Keyboard focus on search widget at database unlocking
+        connect(dbWidget, SIGNAL(unlockedDatabase()), this, SLOT(searchFocus()));
         // Enforce search policy
         emit caseSensitiveChanged(m_actionCaseSensitive->isChecked());
         emit limitGroupChanged(m_actionLimitGroup->isChecked());