Re-insert secondary modal close button to address

accessibility issue.

src/fmg-components/funnel-header/menu-modal/menu-modal.vue

@@ -21,6 +21,19 @@
         aria-hidden="true"
         v-on="{ 'show.bs.modal': show, 'hide.bs.modal': hide }"
         :style="`height: calc(100% - ${currentFooterAndHeaderHeight}px);`">
+        <div class="menu-modal-container">
+            <button
+            class="menu-button"
+            type="button"
+            :class="[isActive ? 'active' : '']"
+            data-bs-toggle="modal"
+            data-bs-target="#footerModal"
+            aria-label="Hamburger Menu (modal window)">
+            <div class="bar1"></div>
+            <div class="bar2"></div>
+            <div class="bar3"></div>
+        </button>
+    </div>
         <div class="modal-dialog modal-fullscreen">
             <div class="modal-content">
                 <div class="modal-header visually-hidden">