base: Remove redundant checks

Checks for force show navbar (key disabler) instead
navBarHidden & pieEnabled are not required to be checked at current
state because the clear all button will be shown anyway (as long as
without navbar and navbar not force shown)

Also some code reformatting lol #ODE

Change-Id: I9173eb817d2ac9b43b1f0e2cc1c8e4edb2ff72ef