Fixed bug where display state was not changed with collapse_all

linkstore/static/linkstore/js/collapse.js

@@ -20,6 +20,7 @@ function collapse_all () {
         content = colls[i].nextElementSibling;
         if (content.style.display === "block") {
 	    content.style.display = "none";
+	    colls[i].classList.toggle("active");
 	}
     }
 }