Part-DB.Part-DB-server/assets/ckeditor/plugins/PartDBLabel/PartDBLabel.css

.cke_placeholder {
    background: #ffff00;
    padding: 1px 2px;
    outline-offset: -2px;
    line-height: 1em;
    margin: 0 1px;
    display: inline-block;
}

.cke_placeholder::selection {
    display: none;
}

/*.cke_overflow_dropdown {
    overflow: auto;
    height: 40vh;
}*/

/** Make long editor dropdown panels scrollable */
.ck-dropdown__panel {
    overflow: auto;
    max-height: 40vh;
}