frontend fixes

            <span class="flex">

                <input type="button" id="buttonConnect"  onclick="buttonConnectClick()" value="Connect">

                <input type="button" id="buttonTurnOffApp" onclick="turnOffAppClick()" value="Turn off app" disabled>

                <input type="button" id="buttonTurnOffApp" onclick="turnOffAppClick()" value="Release camera" disabled>

                <button type="button" id="buttonPowerOff" onclick="powerOffClick()" value="Power off" disabled>

                    <svg version="1.1" class="svgIcon" xmlns="http://www.w3.org/2000/svg" x="0px" y="0px" width="31.182px" height="31.182px" viewBox="0 0 31.182 31.182">

                        <path d="M15.591,16.089c-0.781,0-1.417-0.635-1.417-1.417V3.074c0-0.783,0.636-1.418,1.417-1.418c0.783,0,1.418,0.635,1.418,1.418 v11.598C17.009,15.454,16.374,16.089,15.591,16.089z"/>

.box

{

    height: fit-content;

    width: fit-content;

    position: fixed;

    left: 0;

    right: 0;

    top: 0;

    bottom: 0;        

    position: absolute;

    left: 50%;

    top: 50%;

    -webkit-transform: translate(-50%, -50%);

    transform: translate(-50%, -50%);

    padding: 15px 30px;

    margin: auto;