Actions Bar Clean Up

Summary:
`_actions-bar.scss` Sass files not needed.

All styles can be applied with just `.actions-bar` class.

no need for `--variation` styles

Test Plan:
* Click around
* Use the app
* Resize the browser (simulates different devices)
Does this break the layout?

Reviewers: dkobia, shadowhand

Reviewed By: shadowhand

Differential Revision: https://phabricator.ushahidi.com/D5