Fix not scrolling in search results when ArrowUp or ArrowDown for Aliki (#1587)

If we use Up arrow key or Down arrow key in search results, the scroll
bar doesn't scroll, instead, the scroll bar of the whole page scroll.

This PR fixes it.

Author: ccmywish

lib/rdoc/generator/template/aliki/js/aliki.js

@@ -70,8 +70,6 @@ function createSearchInstance(input, result) {
     window.location.href = result.firstChild.firstChild.href;
   }
 
-  search.scrollIntoView = search.scrollInWindow;
-
   return search;
 }
 

lib/rdoc/generator/template/aliki/js/search_controller.js

@@ -96,7 +96,7 @@ SearchController.prototype = Object.assign({}, SearchNavigation, new function()
       this.current.classList.remove('search-selected');
       next.classList.add('search-selected');
       this.input.setAttribute('aria-activedescendant', next.getAttribute('id'));
-      this.scrollIntoView(next, this.view);
+      this.scrollInElement(next, this.result);
       this.current = next;
       this.input.value = next.firstChild.firstChild.text;
       this.input.select();