Fixed keyboard shortcuts not working on issue boards

Closes #21071

app/assets/javascripts/dispatcher.js

@@ -20,6 +20,9 @@
       path = page.split(':');
       shortcut_handler = null;
       switch (page) {
+        case 'projects:boards:show':
+          shortcut_handler = new ShortcutsNavigation();
+          break;
         case 'projects:issues:index':
           Issuable.init();
           new IssuableBulkActions();

spec/features/boards/boards_spec.rb

@@ -572,6 +572,18 @@ describe 'Issue Boards', feature: true, js: true do
     end
   end
 
+  context 'keyboard shortcuts' do
+    before do
+      visit namespace_project_board_path(project.namespace, project)
+      wait_for_vue_resource
+    end
+
+    it 'allows user to use keyboard shortcuts' do
+      find('.boards-list').native.send_keys('i')
+      expect(page).to have_content('New Issue')
+    end
+  end
+
   context 'signed out user' do
     before do
       logout