public/scripts/extensions/assets/window.html

<div id="assets_ui">
    <div class="inline-drawer">
        <div class="inline-drawer-toggle inline-drawer-header">
            <b data-i18n="Download Extensions & Assets">Download Extensions & Assets</b>
            <div class="inline-drawer-icon fa-solid fa-circle-chevron-down down"></div>
        </div>
        <div class="inline-drawer-content">
            <small>
                <span data-i18n="Load a custom asset list or select">
                    Load a custom asset list or select
                </span>
                <a class="assets-install-hint-link" data-i18n="Install extension">Install&nbsp;Extension</a>
                <span data-i18n="to install 3rd party extensions.">
                    to install 3rd party extensions.
                </span>
            </small>
            <div class="assets-url-block m-b-1 m-t-1">
                <label for="assets-json-url-field" data-i18n="Assets URL">Assets URL</label>
                <small data-i18n="[title]load_asset_list_desc" title="Load a list of extensions & assets based on an asset list file.

The default Asset URL in this field points to the list of offical first party extensions and assets.
If you have a custom asset list, you can insert it here.

To install a single 3rd party extension, use the &quot;Install Extensions&quot; button on the top right.">
                    <span data-i18n="Load an asset list">Load an asset list</span>
                    <div class="fa-solid fa-circle-info opacity50p"></div>
                </small>
                <div class="assets-connect-div">
                    <input id="assets-json-url-field" class="text_pole widthUnset flex1">
                    <i id="assets-connect-button" class="menu_button fa-solid fa-plug-circle-exclamation fa-xl redOverlayGlow" title="Load Asset List" data-i18n="[title]Load Asset List"></i>
                </div>
            </div>
            <div id="assets_filters" class="flex-container">
                <select id="assets_type_select" class="text_pole flex1">
                </select>
                <input id="assets_search" class="text_pole flex1" data-i18n="[placeholder]Search" placeholder="Search" type="search">
                <div id="assets-characters-button" class="menu_button menu_button_icon">
                    <i class="fa-solid fa-image-portrait"></i>
                    <span data-i18n="Characters">Characters</span>
                </div>
            </div>
            <div id="assets_menu">
            </div>
        </div>
    </div>
</div>