Save sort order when loading project issues

This was previously done implicitly when we called the finder. Now that
we don't need the finder, we need to call this explicitly.

app/controllers/projects/issues_controller.rb

@@ -72,9 +72,12 @@ class Projects::IssuesController < Projects::ApplicationController
   attr_accessor :vulnerability_id
 
   def index
-    set_issuables_index if !html_request? || Feature.disabled?(:vue_issues_list, project&.group, default_enabled: :yaml)
-
-    @issues = @issuables
+    if html_request? && Feature.enabled?(:vue_issues_list, project&.group, default_enabled: :yaml)
+      set_sort_order
+    else
+      set_issuables_index
+      @issues = @issuables
+    end
 
     respond_to do |format|
       format.html