We should consider unifying the block toolbar across the basic text blocks, so they all share the same recognizable block toolbar, consisting of the Switcher, Alignments, and Inline controls (Bold, Italic, etc.). This would include at least the paragraph and heading blocks, and possibly more.

Mockups:

Original text:

Issue Overview

The component toolbar does not have any alignment tools for headings.

Steps to Reproduce (for bugs)

1. The classic visual editor has alignment tools for headings.
   https://cl.ly/0m1B2v1f3A3i
2. The Gutenberg editor does not.
   https://cl.ly/0g3z2w1I162z

Chrome 62.0

Expected Behavior

Should be the same in both editors.

Current Behavior

Is not the same.

Possible Solution

Add the alignments tools.