Need a quick, large and wide Up Button. I hope the author will default to the following flexible style:

#pages {
display: flex !important;
flex-direction: wrap;
flex-wrap: wrap;
}
#pages > * {
padding: 3px 15px;
}
#upbutton {
flex-basis: 100%;
order: 2;
text-align: center;
font-size: 1.5em;
padding-top: 15px;
background: rgba(0, 0, 0, 0.15);
}
.delimiter,
.customdelimiter {
display: none !important;
}

/* Other */
body {
background: #a7a7a7!important;
}
.imgcontainer {
border-radius: 0px 0px 10px 10px;
}
.container table tr td {
border-radius: 10px 10px 10px 10px;
}
div[type="remove"] {
border-radius: 0px 10px 0px 0px;
}

Just try it, there's a surprise.