refs #19648 [fid_bbi] some style fixes

* fix hover effect on cart buttons
* fix alerts overlaying modal close button

also refs #18965

themes/fid_bbi/scss/blocks/alert.scss

@@ -7,6 +7,7 @@
   padding: g(.5) g();
   padding-left: g(2.75);
   position: relative;
+  width: auto;
 
   &.alert-danger {
     color: $text-color;

themes/fid_bbi/scss/blocks/result.scss

@@ -12,6 +12,7 @@
   margin: g(-.25) g(.25) g(-.25) g(.25 + 1);
 
   > a,
+  > .cart-buttons > a:not(.hidden),
   > .dropdown > a {
     display: block;
     margin: g(.25) g(-.25) g(-.25);