[FIX] website_quote: css issue for mobile view

When seen from a mobile, the shortcut menu was over the content of the
quote and hid it.

This fix sets the menu inline in the page when he has no place to be on a
column on its own.

opw-633890

addons/website_quote/static/src/css/website_quotation.css

@@ -36,6 +36,11 @@
   font-size: 90%;
 }
 
+@media (max-width: 991px) {
+  .o_website_quote .bs-sidebar {
+    position: static;
+  }
+}
 @media (min-width: 992px) {
   .o_website_quote .bs-sidebar .nav > .active > ul {
     display: block;