Fixes BHV-13602

## Issue
Setting `display` style in code was conflicting with setting `showing: false` on list action controls

## Fix
Move display style into CSS files so it can be overridden correctly by `showing`

Enyo-DCO-1.1-Signed-off-by: Ryan Duffy <ryan.duffy@lge.com>
@DavidUM `stacked` is set if the width of the drawer is not large enough to allow at least 300px for each list action menu. There were a couple problems with this line of code. First, it should have been passing the property name to `set()` rather than the value. Second, `stacked` is a boolean property and `'false'` is truthy (despite what logic would dictate) so `stackedChanged` wasn't evaluating correctly.