Revert:NavigationBar Customization [1/2]

Remove Navbar (Just got tired of dealing with so many annoying bugs)

Revert "SystemUI: NavbarEditor: Fix saveKeys logic"

This reverts commit 1e2899bd07f2b8be3e34a06805d4895bd9b31e47.

Revert "[1/2] NavigationBar Customization"

This reverts commit d9118ac1fdafcf6a2c17b723d6f9d7e602e78395.