refs #17294 [fid_adlr] reset modal close button to adlr style

* override master-v5 BARF changes
* similar to fid bbi or even non fid => move overrides into fid /finc as _lightbox.scss?

themes/fid_adlr/scss/_lightbox.scss

 
 @media (min-width: 768px) {
   #modal .modal-content > .close { // Fancy side X button
+    background: transparent;
     border: 0;
     color: $white;
     font-size: 32pt;
+    opacity: 0.7;
     outline: none;
     right: -50px;
+    text-shadow: 0 1px 0 #fff;
+
+    &:hover {
+      background: transparent;
+    }
 
     body.rtl & {
       left: -50px;