logic: Fixed issues in search

* fixed bad search performance when rescoring
* fixed commands had no text in autocompletions
* no autocompletions when entering fulltext search query
* check query actuality before processing autocompletions

src/lib_gui/qt/view/QtSearchView.cpp

@@ -37,6 +37,11 @@ void QtSearchView::refreshView()
 	m_refreshViewFunctor();
 }
 
+std::string QtSearchView::getQuery() const
+{
+	return m_widget->query().toStdString();
+}
+
 void QtSearchView::setMatches(const std::vector<SearchMatch>& matches)
 {
 	m_setMatchesFunctor(matches);