You can fully customize your WordPress login page with Easy Custom Login plugin.

Re-positions your wordpress admin menu from the left side to the top. Have a less cluttered admin area for you or your clients to use

You can show/hide specific items, change icon, title, reorder the menus for users. You can have a clean and mistake-free menu for your clients, to other WordPress users and even entire roles.

Custom Admin Menu is the best plugin for managing your WordPress Dashboard Menus.