add dynamic language change support

add "en" ts

qad/application/historyview.cpp

@@ -1,4 +1,5 @@
 #include "historyview.h"
+#include <QEvent>
 
 
 HistoryView::HistoryView(QWidget* parent): QListWidget(parent) {
@@ -89,6 +90,18 @@ void HistoryView::checkLimit() {
 }
 
 
+void HistoryView::changeEvent(QEvent * e) {
+	QListWidget::changeEvent(e);
+	switch (e->type()) {
+		case QEvent::LanguageChange:
+			actions_[-1].text = tr("History cleared");
+			break;
+		default:
+			break;
+	}
+}
+
+
 void HistoryView::itemClicked(QListWidgetItem * item) {
 	if (!active_) return;
 	if (index == row(item) + 1) return;