Add English and Russian ChatGUI interface translations

tools/chatgui/src/chatview.cpp

@@ -1,3 +1,4 @@
+#include <QCoreApplication>
 #include "chatview.h"
 #include "messagedelegate.h"
 #include "emoji.h"
@@ -44,7 +45,7 @@ ChatView::ChatView(QWidget *parent)
         "  background: rgba(90,90,90,220);"
         "}"
     );
-    m_scrollDownBtn->setToolTip(tr("Scroll to bottom"));
+    m_scrollDownBtn->setToolTip(QCoreApplication::translate("ChatGui", "Scroll to bottom"));
     m_scrollDownBtn->setVisible(false);
 
     connect(m_scrollDownBtn, &QPushButton::clicked, this, [this]() {