Ensure webform 'inline' styles actually display inline

Problem/Motivation

Webform 'inline' labels stay above their input.

Steps to reproduce

Create a webform page, set an element to have a title inline.

Proposed resolution

For initial notes see https://drupal.stackexchange.com/questions/303537/how-can-the-webform-el...

Remaining tasks

User interface changes

API changes

Data model changes