SillyTavern/public/scripts/extensions/regex/dropdown.html

<div class="regex_settings">
    <div class="inline-drawer">
        <div class="inline-drawer-toggle inline-drawer-header">
            <b>Regex</b>
            <div class="inline-drawer-icon fa-solid fa-circle-chevron-down down"></div>
        </div>
        <div class="inline-drawer-content">
            <div id="open_regex_editor" class="menu_button">
                <i class="fa-solid fa-pen-to-square"></i>
                <span>Open Editor</span>
            </div>
            <hr />
            <label>Saved Scripts</label>
            <div id="saved_regex_scripts" class="flex-container regex-script-container flexFlowColumn"></div>
        </div>
    </div>
</div>