Disable key events for InputPanel's text controls (#520)

Author: SSimco

src/gui/input/panels/InputPanel.cpp

@@ -212,6 +212,10 @@ void InputPanel::bind_hotkey_events(wxTextCtrl* text_ctrl)
 	text_ctrl->Bind(wxEVT_SET_FOCUS, &InputPanel::on_edit_key_focus, this);
 	text_ctrl->Bind(wxEVT_KILL_FOCUS, &InputPanel::on_edit_key_kill_focus, this);
 	text_ctrl->Bind(wxEVT_RIGHT_DOWN, &InputPanel::on_right_click, this);
+#if BOOST_OS_LINUX
+	// Bind to a no-op lambda to disable arrow keys navigation
+	text_ctrl->Bind(wxEVT_KEY_DOWN, [](wxKeyEvent &) {});
+#endif
 }
 
 void InputPanel::on_left_click(wxMouseEvent& event)