nextcloud/apps/gallery/css/styles.css

#gallerycontent { margin-top: 2.8em; overflow: visible; }
#g-settings {position: absolute; left 13.5em; top: 0;}
div#controls input[type=button] { -webkit-transition: opacity 0.5s ease-in-out; -moz-transition: opacity 0.5s ease-in-out; -o-transition: opacity 0.5s ease-in-out; opacity: 1; position:absolute; right:13.5em; top:0em; }
input[type=button]:disabled { opacity: 0.5 }
.ui-dialog tr {background-color: #eee;}
.ui-dialog input {width: 90%;}