fix: menu images + shadow

src/QUI/Menu/Mega/Image.css

 .quiqqer-menu-megaMenu-children-image {
+    display: flex;
+    flex-wrap: wrap;
     float: left;
     width: 100%;
 }
 
 .quiqqer-menu-megaMenu-children-image-entry {
+    /*flex-grow: 1;*/
     float: left;
-    padding: 0 10px;
-    width: 25%
+    margin-bottom: 10px;
+    min-width: 25%;
+    padding: 10px;
+    width: 25%;
 }
 
 .quiqqer-menu-megaMenu-children-image-entry-img {
     background-position: center center;
+    background-repeat: no-repeat;
     background-size: cover;
+    border: 1px solid rgba(0, 0, 0, 0.2);
     float: left;
-    padding-bottom: 56.25%; /*   16:9*/
+    padding-bottom: 56.25%; /* 16:9 */
+    position: relative;
+    width: 100%;
+}
+
+.quiqqer-menu-megaMenu-children-image-entry-img .quiqqer-icon {
+    font-size: 60px;
+    position: absolute;
+    top: calc(50% - 30px);
+    text-align: center;
     width: 100%;
 }
 
 .quiqqer-menu-megaMenu-children-image-entry-title {
     clear: both;
     float: left;
+    padding: 5px 0;
     width: 100%;
 }
\ No newline at end of file

src/QUI/Menu/Mega/Image.html

 {foreach $children as $Child}
 <div class="quiqqer-menu-megaMenu-children-image-entry">
-    <div class="quiqqer-menu-megaMenu-children-image-entry-img">
-        {image src=$Child->getAttribute('image_site') width=300}
-    </div>
-    <a href="{url Site=$Child}" class="quiqqer-menu-megaMenu-children-image-entry-title">
-        {$Child->getAttribute('title')}
+    <a href="{url Site=$Child}">
+        {image src=$Child->getAttribute('image_site') width=300 assign=bg onlysrc=1}
+        <div class="quiqqer-menu-megaMenu-children-image-entry-img"
+             style="background-image: url('{$bg}')"
+        >
+            &nbsp;
+            {image src=$Child->getAttribute('image_site') onlyicon=1}
+        </div>
+        <span class="quiqqer-menu-megaMenu-children-image-entry-title">
+            {$Child->getAttribute('title')}
+        </span>
     </a>
 </div>
 {/foreach}
\ No newline at end of file

src/QUI/Menu/MegaMenu.css

@@ -27,6 +27,7 @@
 
 .quiqqer-menu-megaMenu-list-item-menu {
     align-content: stretch;
+    box-shadow: 0 10px 20px 0 rgba(0, 0, 0, 0.35);
     display: none;
     left: 0;
     position: absolute;