Add chat history keyboard scrolling and remove unused PTT setting

tools/chatgui/src/inputbar.cpp

@@ -148,6 +148,7 @@ InputBar::InputBar(EmojiPanel *emojiPanel, AudioRecorder *recorder, QWidget *par
     m_input->setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
     m_input->setVerticalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
     m_input->setTabChangesFocus(true);
+    setFocusProxy(m_input);
     m_input->setStyleSheet(
         "QTextEdit { border: 1px solid palette(mid); border-radius: 6px;"
         " padding: 4px 8px; background: palette(base); }"