Overwrite Bootstrap Link Renderer for WillPaginate

Without this fix, the new will_paginate version is not compatible with the old version of bootstrap-will_paginate. This issue is also tracked here: mislav/will_paginate#649

Fixes CODEOCEAN-QK

config/initializers/monkey_patches.rb

@@ -7,3 +7,13 @@ def average
     end
   end
 end
+
+module WillPaginate
+  module ActionView
+    class Bootstrap4LinkRenderer
+      def previous_or_next_page(page, text, classname, aria_label = nil)
+        tag :li, link(text, page || '#', :class => 'page-link', :'aria-label' => aria_label), :class => [(classname[0..3] if  @options[:page_links]), (classname if @options[:page_links]), ('disabled' unless page), 'page-item'].join(' ')
+      end
+    end
+  end
+end