Add status information to GUI

[jkaszowski]

Add following information as labels on main windows:

• status of connection to the robot
• status of connection to the gamepad
• labels with values of selected buttons from gamepad (Left and Right thumbsticks position, A, B, X, Y)
• label next to an existing drop box menu
• drop box for selection of gamepad

[jkaszowski]

Please note that only label saying connected or disconnected is not enought -there should be label next to it stating of what connection the status is of