Fixed app uninstall causing apps to not load properly

This is because the app id is not removed from Apps.order.
Added a recently closed drawer with nothing inside!

* Centralized all the drawer css.
* Moved the drawer icons into a div which contains them.
* Changed the drawer icon size to 32px, as otherwise recently closed icon
  doesn't look centered.
* Fixed bug where drawer cannot be closed.
Implemented recently closed, and tweaked drawer styling.