XF 2.2 Remove submenu and keep dropdown

[grantus]

For the main menu items that have a submenu, I'd like to keep the dropdown option permanent (the down arrow).

I've removed the submenu using CSS but for example, if I go to the forum homepage, the arrow doesn't show and it instead shows the submenu. Since I've removed the submenu, how can I just keep the menu item and arrow no matter what page I'm on?

I just want to have the main menu items and the dropdowns no matter what page I'm on.