Return close button style

jet/static/jet/css/_sidebar.scss

@@ -102,6 +102,28 @@
     }
   }
 
+  &-close {
+    display: none;
+    position: absolute;
+    right: 0;
+    padding: 4px;
+    margin: 12px 18px 0 12px;
+    background-color: $sidebar-popup-search-input-background-color;
+    border-radius: 5px;
+    z-index: 1;
+
+    @include for-mobile {
+      display: inline-block;
+    }
+
+    &-icon {
+      color: $sidebar-popup-search-input-text-color;
+      font-size: 28px;
+      font-weight: bold;
+      vertical-align: middle;
+    }
+  }
+
   &-wrapper {
     height: 100%;
     overflow-y: auto;